GATE Overflow - Recent questions tagged probability
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http://gateoverflow.in/144372/probability
<p><img alt="" height="201" src="http://gateoverflow.in/?qa=blob&qa_blobid=3799245635594239058" width="652"></p>Probabilityhttp://gateoverflow.in/144372/probabilityTue, 15 Aug 2017 13:28:46 +0000Probability Gate EE 2016
http://gateoverflow.in/143924/probability-gate-ee-2016
Candidates were asked to come to an interview with 3 pens each. Black, blue, green and red were the permitted pen colours that the candidate could bring. The probability that a candidate comes with all 3 pens having the same colour is _________.Probabilityhttp://gateoverflow.in/143924/probability-gate-ee-2016Sun, 13 Aug 2017 18:59:07 +0000probability
http://gateoverflow.in/142502/probability
<p><img alt="" src="http://gateoverflow.in/?qa=blob&qa_blobid=5164991502263664022"></p>Mathematical Logichttp://gateoverflow.in/142502/probabilityTue, 08 Aug 2017 14:49:42 +0000Probability
http://gateoverflow.in/142244/probability
Suppose that in the production of 60-ohm radio<br />
resistors, nondefective items are those that have a<br />
resistance between 58 and 62 ohms and the probability<br />
of a resistor’s being defective is 0.1%.The resistors<br />
are sold in lots of 200, with the guarantee that all<br />
resistors are nondefective. What is the probability that<br />
a given lot will violate this guarantee? (Use the Poisson<br />
distribution.)<br />
<br />
Using bernoulli:18%Engineering Mathematicshttp://gateoverflow.in/142244/probabilityMon, 07 Aug 2017 06:59:26 +0000Sheldon Ross - Probability (2nd chapter)
http://gateoverflow.in/141823/sheldon-ross-probability-2nd-chapter
<p>Poker dice is played by simultaneously rolling 5 dice.Show that</p>
<p>(a) P{no two alike} = .0926;
<br>
(b) P{one pair} = .4630;
<br>
(c) P{two pair} = .2315;
<br>
(d) P{three alike} = .1543;
<br>
(e) P{full house} = .0386;
<br>
(f) P{four alike} = .0193;
<br>
(g) P{five alike} = .0008.</p>
<p><span class="marker">My doubt is how is this different from poker played by cards? Is it that when we play via dice the order of the dice outcome matters which doesn't in case of cards.(i.e the order of cards in hand). So if we think the case of having one pair as </span></p>
<p><span class="marker"><6 6 5 1 2> and <6 5 1 2 6> both outcomes are different?</span></p>
<p><span class="marker">but <6(1st six) 5 1 2 6 (second six)> and <6(2nd six) 5 1 2 6(1st six)> both are same,since its the same one pair but the pairs doesn't generate new outcome when position is changed.</span></p>
<p>i.e for question (b) probability is = 6C1 (for selecting pair outcome) * 5C2 (possibility of selecting a pair of hand out of five,but order does not matter when pair partners are exchanged) * 5 * 4* 3 (because order matters of the outcomes of other non-pairs) this total divided by 6^5. Is my assumption true?</p>Combinatoryhttp://gateoverflow.in/141823/sheldon-ross-probability-2nd-chapterSat, 05 Aug 2017 07:41:33 +0000Probability: Poisson distribution calculation vs normal probability calculation
http://gateoverflow.in/141096/probability-distribution-calculation-probability-calculation
<p><img alt="" src="http://gateoverflow.in/?qa=blob&qa_blobid=6871126998631182856"></p>
<p>In this question if we do simply probability calculation then it is 8/20 40%</p>
<p>but when I am appling poisson distribution then it is 40.4%.</p>
<p>why we are getting two different answers??</p>Mathematical Logichttp://gateoverflow.in/141096/probability-distribution-calculation-probability-calculationTue, 01 Aug 2017 18:18:46 +0000Conditional Probability
http://gateoverflow.in/141030/conditional-probability
If the occurrence of some events are dependent on the occurrence of an event A then sum of all the joint<br />
<br />
probabilities in which the occurrence of event A is considered gives the<br />
<br />
a) Subjective probability of event A<br />
<br />
b) Classical probability of event A<br />
<br />
c) Conditional probability of event A<br />
<br />
d) Marginal Probability of event A<br />
<br />
e) Relative frequency of occurrence of event AProbabilityhttp://gateoverflow.in/141030/conditional-probabilityTue, 01 Aug 2017 10:45:25 +0000Probability fair and unfair coin together
http://gateoverflow.in/138892/probability-fair-and-unfair-coin-together
<p>How to solve this question.</p>
<p><a rel="nofollow" href="https://www.facebook.com/photo.php?fbid=1131807666919473&set=gm.1597917393573841&type=3&theater">https://www.facebook.com/photo.php?fbid=1131807666919473&set=gm.1597917393573841&type=3&theater</a></p>
<p>A box contains 5 fair coins and 5 biased coins. Each biased coin has a probability of a head 4/5. A coin is drawn at random from the box and tossed. Then a second coin is drawn at random from the box (without replacing the first one.) Given that the first coin has shown head, the conditional probability that the second coin is fair, is </p>
<p>a) 20/39</p>
<p>b) 20/37</p>
<p>c) 1/2</p>
<p>d) 7/13</p>Databaseshttp://gateoverflow.in/138892/probability-fair-and-unfair-coin-togetherThu, 20 Jul 2017 13:43:34 +0000Discreate Random Variable (Rose_8th Edition)
http://gateoverflow.in/138439/discreate-random-variable-rose_8th-edition
Three balls are to be randomly selected without replacement from an urn containing 20 balls numbered 1 through 20. If we bet that at least one of the balls that are drawn has a number as large as or larger than 17, what is the probability that we win the bet?<br />
<br />
My Approach through random variables:<br />
<br />
let X is the random variable defined as:<br />
<br />
X = number of balls having the number on them >= 17 in three drawn.<br />
<br />
In the question, they have asked for at least 1 then we can place the values of X are 1,2,3;<br />
<br />
P(X = 1 ) = (4/20) * (16/19) * (15 / 18) = 0.14035<br />
<br />
P(X = 2 ) = (4/20) * (3/19) * (16 / 18) = 0.02807<br />
<br />
P(X = 3 ) = (4/20) * (3/19) * (2 / 18) = 0.00350<br />
<br />
Prob of wining bet = P(X=1) + P(X=2) + P(X=3) <br />
<br />
= 0.17192<br />
<br />
but the answer is 0.508<br />
<br />
what is wrong with this approach.Combinatoryhttp://gateoverflow.in/138439/discreate-random-variable-rose_8th-editionTue, 18 Jul 2017 05:33:06 +0000Probability # Distribution
http://gateoverflow.in/137764/probability-%23-distribution
A traffic office imposes on an average 5 number of penalities daily on traffic violators.Assume that the number of the penalties on different days is independent and follows a Poisson distribution.The probability that there will be less than 4 penalties in a day is _______________ ?Mathematical Logichttp://gateoverflow.in/137764/probability-%23-distributionFri, 14 Jul 2017 09:22:11 +0000probability
http://gateoverflow.in/137763/probability
a lot consists of 12 good pencils, 6 with minor defects and 2 with major defects. A pencil is chosen at random. The probability that this pencil is not defective is?Probabilityhttp://gateoverflow.in/137763/probabilityFri, 14 Jul 2017 09:19:07 +0000probability
http://gateoverflow.in/137762/probability
a lot consists of good pencils, 6 with minor defects and 2 with major defects. A pencil is chosen at random. The probability that this pencil is not defective is?Probabilityhttp://gateoverflow.in/137762/probabilityFri, 14 Jul 2017 09:18:35 +0000Probability
http://gateoverflow.in/137761/probability
A box contains 4 red balls and 6 black balls .Three balls are selected randomly from the box one after another without replacement .The probability that the selected set contains one red ball and two black ball is <br />
<br />
A)1/20<br />
<br />
B) 1/12<br />
<br />
C) 3/10<br />
<br />
D)1/2Mathematical Logichttp://gateoverflow.in/137761/probabilityFri, 14 Jul 2017 09:13:45 +0000Probability
http://gateoverflow.in/137756/probability
A fair (unbiased) coin was tosssed four times in succession and resulted in the following outcomes:<br />
<br />
i)Head , ii) Head, iii) Head iv)Head. The probability of obtaining a "Tail" when a coin is tossed again is<br />
<br />
A) 0<br />
<br />
B) 1/2<br />
<br />
C) 4/5<br />
<br />
D) 1/5Mathematical Logichttp://gateoverflow.in/137756/probabilityFri, 14 Jul 2017 09:08:30 +0000Probability
http://gateoverflow.in/137755/probability
A fair coin is tossed till a head appears for the first time .The probability that the number of required tosses is odd.<br />
<br />
A) 1/3<br />
<br />
B) 1/2<br />
<br />
C)2/3<br />
<br />
D)3/4Mathematical Logichttp://gateoverflow.in/137755/probabilityFri, 14 Jul 2017 09:01:30 +0000# Probability
http://gateoverflow.in/137733/%23-probability
<p><strong>What is the expected no. of heads that come up when fair coin is flipped five times?</strong></p>Mathematical Logichttp://gateoverflow.in/137733/%23-probabilityFri, 14 Jul 2017 07:03:36 +0000probability
http://gateoverflow.in/137217/probability
<p><em>India plays two matches each with West I</em><em>ndies</em><em> and Srilanka. In any </em><em>match</em><em> the probabilities of I</em><em>ndia</em><em> getting points 0,1 and 2 are 0.45,0.05 and 0.50 respectively. Assuming that the outcomes are independent, the probability of I</em><em>ndia</em><em> getting </em><em>at least</em><em> 7 points is?</em></p>
<p><em>a) 0.8750 b) 0.0875 c) 0.0625 d) 0.0250</em></p>Probabilityhttp://gateoverflow.in/137217/probabilityTue, 11 Jul 2017 09:10:49 +0000Probability posion distribtuion
http://gateoverflow.in/135554/probability-posion-distribtuion
the tailors in the stitching shop on an average stitches 3 shorts in an hour,stitching has a poison distribution.During a particular hour ,what is the probability that number of shirts stitched are 5 or more?<br />
<br />
a) .8571<br />
<br />
b.) .8152<br />
<br />
c.) .1848<br />
<br />
d.).1439Probabilityhttp://gateoverflow.in/135554/probability-posion-distribtuionSat, 01 Jul 2017 07:43:11 +0000Gate EE 17
http://gateoverflow.in/135069/gate-ee-17
Assume that in a traffic junction, the cycle of traffic signal lights is 2 minutes of green(vehicle does not stop) and 3 minutes of red (vehicle stops). Consider the arrival time of vehicles at the junction is uniformly distributed over 5 minute cycle. The expected waiting time in minutes for the vehicle at the junction is _________Probabilityhttp://gateoverflow.in/135069/gate-ee-17Wed, 28 Jun 2017 10:26:41 +0000Sheldon Ross Chapter 1 Example 3c
http://gateoverflow.in/134909/sheldon-ross-chapter-1-example-3c
Ms. Jones has 10 books that she is going to put on her bookshelf. Of these, 4 are mathematics books, 3 are chemistry books, 2 are history books, and 1 is a language book. Ms. Jones wants to arrange her books so that all the books dealing with the same subject are together on the shelf. How many different arrangements are possible? <br />
<br />
Please provide a different explanation rather than the textbook one.Combinatoryhttp://gateoverflow.in/134909/sheldon-ross-chapter-1-example-3cTue, 27 Jun 2017 06:52:14 +0000[Gate 2006 EC] Probability
http://gateoverflow.in/134674/gate-2006-ec-probability
<p>Three companies, X, Y and Z supply computers to a university. The percentage of computers supplied by them and the probability of those being defective are tabulated below.</p>
<table border="1" cellpadding="0" cellspacing="0" style="width:100%">
<tbody>
<tr>
<td> Company</td>
<td> % of computers supplied </td>
<td> Probability of being defective</td>
</tr>
<tr>
<td> X</td>
<td> 60%</td>
<td> 0.01</td>
</tr>
<tr>
<td> Y</td>
<td> 30%</td>
<td> 0.02</td>
</tr>
<tr>
<td> Z</td>
<td> 10%</td>
<td> 0.03</td>
</tr>
</tbody>
</table>
<p>Given that a computer is defective, the probability that it was supplied by Y is: [2 marks]
<br>
(A) 0.1
<br>
(B) 0.2
<br>
(C) 0.3
<br>
(D) 0.4</p>
<p>I got the correct answer by applying bayees theorem. But that theorem is applicable where the events are collectively exhaustive and mutual exclusive. These are collectively exhaustive but i don't think that they are mutually exclusive as Supplying of x does not mean that y wont supply.Please clear this doubt.</p>Probabilityhttp://gateoverflow.in/134674/gate-2006-ec-probabilitySun, 25 Jun 2017 06:07:49 +0000Probability
http://gateoverflow.in/134654/probability
P( A union B)=.6<br />
<br />
P( A intersection B)=.25<br />
<br />
Find P(A`) +P(B`) ? <br />
<br />
where P(A`) means probability of A complement.Mathematical Logichttp://gateoverflow.in/134654/probabilitySat, 24 Jun 2017 20:57:59 +0000IISc PhD
http://gateoverflow.in/132635/iisc-phd
A bag contains Red Balls and Black Balls. Two balls are drawn without replacement. The probability that both the balls drawn are red is 1/2. What is the minimum number of Red and Black Balls for which this probability is satisfied?Probabilityhttp://gateoverflow.in/132635/iisc-phdSun, 11 Jun 2017 07:18:42 +0000Sheldon Ross chapter 2 questions 26
http://gateoverflow.in/132384/sheldon-ross-chapter-2-questions-26
The game of craps is played as follows: A player rolls two dice. If the sum of the dice is either a 2, 3, or 12, the player loses; if the sum is either a 7 or an 11, the player wins. If the outcome is anything else, the player continues to roll the dice until she rolls either the initial outcome or a 7. If the 7 comes first, the player loses, whereas if the initial outcome reoccurs before the 7 appears, the player wins. Compute the probability of a player winning at craps. Hint:Let Ei denote the event that the initial outcome is i and the player wins. The desired probability is $\sum_{i=2}^{12}$P(Ei). To compute P(Ei), define the events Ei,n to be the event that the initial sum is i and the player wins on the nth roll. Argue that P(Ei) =$\sum_{n=1}^{infinte}$ P(Ei,n).Probabilityhttp://gateoverflow.in/132384/sheldon-ross-chapter-2-questions-26Fri, 09 Jun 2017 05:26:43 +0000sheldon ross, chapter 2, question 17
http://gateoverflow.in/132359/sheldon-ross-chapter-2-question-17
If 8 rooks are randomly placed on a chessboard, compute the probability that none of the rooks can caputre any of the others. That is compute the probability that no row or file contains more than one rook.Probabilityhttp://gateoverflow.in/132359/sheldon-ross-chapter-2-question-17Fri, 09 Jun 2017 01:32:42 +0000Probability of dice
http://gateoverflow.in/131870/probability-of-dice
If 4 dice tossed together , what is the probability of sum of these dice will be exactly 20? (want to see some shortcut procedure)Probabilityhttp://gateoverflow.in/131870/probability-of-diceSun, 04 Jun 2017 17:00:17 +0000Probability puzzles
http://gateoverflow.in/130530/probability-puzzles
A grasshopper is sitting on a little stone, which we'll call stone zero. Ahead of him, arranged in a line, are stones one, two, three, et cetera, all the way up to nine. <br />
<br />
The grasshopper would like to reach that ninth stone, for reasons unknown. What we do know is that he'll get there by combining little grasshopper jumps, each of which will take our friend forward by either one or two steps. To be clear, this means the grasshopper has exactly two ways to reach stone two: he could take one big jump, or two little ones. <br />
<br />
How many different paths can the grasshopper take to reach his destination?Probabilityhttp://gateoverflow.in/130530/probability-puzzlesTue, 23 May 2017 10:21:01 +0000Probbility puzzles
http://gateoverflow.in/130529/probbility-puzzles
Three men — conveniently named A, B, and C — are fighting a duel with pistols. It's A's turn to shoot. <br />
<br />
The rules of this duel are rather peculiar: the duelists do not all shoot simultaneously, but instead take turns. A fires at B, B fires at C, and C fires at A; the cycle repeats until there is a single survivor. If you hit your target, you'll fire at the next person on your next turn. <br />
<br />
For example, A might shoot and hit B. With B out of the picture, it would be C's turn to shoot — suppose he misses. Now it's A's turn again, and he fires at C; if he hits, the duel is over, with A the sole survivor. <br />
<br />
To bring in a little probability, suppose A and C each hit their targets with probability 0.5, but that B is a better shot, and hits with probability 0.75 — all shots are independent. <br />
<br />
What's the probability that A wins the duel?Probabilityhttp://gateoverflow.in/130529/probbility-puzzlesTue, 23 May 2017 10:08:48 +0000IIITH-PGEE 2017
http://gateoverflow.in/127525/iiith-pgee-2017
Consider 3 card one having both side painted red another having both side printed black and last having one side black and another side red, 3 cards are put in a hat and are mixed properly, now one card in picked and put down on table, its face up color is red what is probability that another side will be black.Probabilityhttp://gateoverflow.in/127525/iiith-pgee-2017Sun, 30 Apr 2017 18:24:00 +0000Probability
http://gateoverflow.in/125997/probability
Suppose that a particular trait (such as eye color or left-handedness) of a person is classified on the basis of one pair of genes, and suppose that d represents a dominant gene and r a recessive gene. Thus, a person with dd genes is pure dominance, one with rr is pure recessive, and one with rd is hybrid. The pure dominance and the hybrid are alike in appearance. Children receive 1 gene from each parent. If, with respect to a particular trait, 2 hybrid parents have a total of 4 children, what is the probability that 3 of the 4 children have the outward appearance of the dominant gene?Probabilityhttp://gateoverflow.in/125997/probabilityMon, 17 Apr 2017 21:32:07 +0000Probability
http://gateoverflow.in/125717/probability
in a game of bridge the entire deck of 52 cards is dealt out to 4 players.What is the probability that <br />
<br />
i)one of the players receive all 13 spades<br />
<br />
ii )each player receives one ace?Probabilityhttp://gateoverflow.in/125717/probabilitySat, 15 Apr 2017 21:04:10 +0000Probability
http://gateoverflow.in/125714/probability
<p><em>A 5-card poker hand is said to be a full house if it consists of 3 cards of the same denomination and 2 other cards of the same denomination (of course, different from the first denomination). Thus, one kind of full house is three of a kind plus a pair. What is the probability that one is dealt a full house?</em></p>Probabilityhttp://gateoverflow.in/125714/probabilitySat, 15 Apr 2017 20:49:57 +0000Probability Exercise
http://gateoverflow.in/123094/probability-exercise
The chess club of two school consists of 8 and 9 players.4 member from each club are randomly chosen to participate in a competition of two school.chosen player from one team are then randomly paired against chosen players of another team.suppose Rebecca and Elise are in two chess clubs of different school..what is the probability that<br />
<br />
1.Rebecca and Elise will be paired<br />
<br />
2.Rebecca and Elise will be chosen to play but they will NOT be paired against Each OtherProbabilityhttp://gateoverflow.in/123094/probability-exerciseFri, 31 Mar 2017 11:58:29 +0000Ravi asked his neighbor to water a delicate plant while he is away.
http://gateoverflow.in/122637/ravi-asked-his-neighbor-to-water-delicate-plant-while-he-away
Ravi asked his neighbor to water a delicate plant while he is away. Without water, the plant would die with probability $4/5$ and with water, it would die with probability $3/20$. The probability that Ravi’s neighbor would remember to water the plant is $9/10$. If the plant actually died, what is the probability that Ravi’s neighbor forgot to water the plant?<br />
<br />
(A) $4/5$<br />
<br />
(B) $27/43$<br />
<br />
(C) $16/43$<br />
<br />
(D) $2/25$Probabilityhttp://gateoverflow.in/122637/ravi-asked-his-neighbor-to-water-delicate-plant-while-he-awaySun, 26 Mar 2017 23:16:01 +0000probability
http://gateoverflow.in/121747/probability
If from each box of the three boxes containing $3$ white and $3$ black,$2$ white and $2$ black,$1$ white and $3$ black,one ball is drawn at random ,then the probability that $2$ white and $1$ black ball will be drawn ?Probabilityhttp://gateoverflow.in/121747/probabilityThu, 16 Mar 2017 11:35:10 +0000probability
http://gateoverflow.in/121746/probability
There are $N$ persons sitting in a row. Two of them are selected at random.The probability that two selected persons are not together ?Probabilityhttp://gateoverflow.in/121746/probabilityThu, 16 Mar 2017 11:32:26 +0000probability
http://gateoverflow.in/121744/probability
There are four machines and it is known that exactly two of them are faulty .They are tested one by one in a random order till both the faulty machines are identified ,then the probability that only two tests are needed ?Probabilityhttp://gateoverflow.in/121744/probabilityThu, 16 Mar 2017 11:29:59 +0000Discrete Probability Doubt
http://gateoverflow.in/121501/discrete-probability-doubt
Consider a group of k people. Assume that each person's birthday is drawn uniformly at random from the 365 possibilities. (And ignore leap years.) What is the smallest value of ksuch that the expected number of pairs of distinct people with the same birthday is at least one?Combinatoryhttp://gateoverflow.in/121501/discrete-probability-doubtMon, 13 Mar 2017 21:10:18 +0000ISRO 2014- probability [EE]
http://gateoverflow.in/121207/isro-2014-probability-ee
80. A student is to answer 10 out of 13 questions in an examination such that he must choose at least 4 from the first five questions. The number of choices available to him is<br />
(A) 140<br />
(B) 196<br />
<br />
(C) 280<br />
<br />
(D) 346Probabilityhttp://gateoverflow.in/121207/isro-2014-probability-eeFri, 10 Mar 2017 15:30:50 +0000ISRO 2013- probability [EE]
http://gateoverflow.in/121198/isro-2013-probability-ee
Ten percent of screws produced in a certain factory turn out to be defective. Find the probability that in a sample of 10 screws chosen at random, exactly two will be defective.<br />
a) 0.2<br />
<br />
b) 0.25<br />
<br />
c) 0.8<br />
d) 0.3 79.Probabilityhttp://gateoverflow.in/121198/isro-2013-probability-eeFri, 10 Mar 2017 14:37:48 +0000ISRO 2013- Probability/Leap year [Mech]
http://gateoverflow.in/120893/isro-2013-probability-leap-year-mech
Chance that a leap year selected at random will contain 53 Sundays is<br />
(a) 3/7<br />
(b) 7/2<br />
(c) 7/3<br />
(d) 2/7Probabilityhttp://gateoverflow.in/120893/isro-2013-probability-leap-year-mechWed, 08 Mar 2017 09:15:25 +0000ISRO 2013- Probability [Mech]
http://gateoverflow.in/120891/isro-2013-probability-mech
If the probability for A to fail an examination is 0.2 and that for B is 0.3, then probability that either A of B fail is<br />
(a) 0.5<br />
(b) 0.06<br />
(c) 0.44<br />
(d) 0.38Probabilityhttp://gateoverflow.in/120891/isro-2013-probability-mechWed, 08 Mar 2017 09:12:42 +0000combinational circuit
http://gateoverflow.in/120518/combinational-circuit
Let combinational function $f(\text{a, b, c, d}) = \text{abc}'+\text{ab}'\text{cd}'$ (where $x'$ means complement of $x$). If all inputs are equally probable, then the probability that the function evaluates to True is:<br />
(A) 5/16<br />
(B) 1/4<br />
(C) 3/16<br />
(D) 1/8Digital Logichttp://gateoverflow.in/120518/combinational-circuitSat, 04 Mar 2017 15:02:44 +0000Probability
http://gateoverflow.in/120317/probability
The probability that a student knows the correct answer to a multiple choice question is 2/3. If the student doesn't know the answer then the student guess the answer. The probability of the guess answer is being correct is 1/4.given that student has answer the questions correctly, the conditional probability that the student knows the correct answer isMathematical Logichttp://gateoverflow.in/120317/probabilityThu, 02 Mar 2017 22:18:07 +0000ISRO 2008- ECE Probability
http://gateoverflow.in/120242/isro-2008-ece-probability
A husband and wife appear in an interview for two vacancies for same post The. probability of husband getting selected is 1 /5 while the probability of wife getting selected is 1/7. Then the probability that anyone of them getting selected is<br />
<br />
a) 1 /35<br />
<br />
b) 11/35<br />
<br />
c) 12/35<br />
<br />
d) 34/35Probabilityhttp://gateoverflow.in/120242/isro-2008-ece-probabilityThu, 02 Mar 2017 13:22:19 +0000which os the following is not a valid probability density?
http://gateoverflow.in/120083/which-os-the-following-is-not-a-valid-probability-density
which os the following is not a valid probability density?<br />
<br />
-0.1<br />
<br />
1<br />
<br />
100<br />
<br />
1.1<br />
<br />
//this question is taken from one of the IIT kanpur interview experience blogs-Probabilityhttp://gateoverflow.in/120083/which-os-the-following-is-not-a-valid-probability-densityTue, 28 Feb 2017 22:55:53 +0000ISRO2012-ECE Probability
http://gateoverflow.in/119982/isro2012-ece-probability
Person X can solve 80% of the ISRO question paper and Person Y can solve 60%. The probability that at least one of them will solve a problem from the question paper, selected at random is :<br />
a. 0.48<br />
<br />
b. 0.70<br />
c. 0.88<br />
<br />
d. 0.92Probabilityhttp://gateoverflow.in/119982/isro2012-ece-probabilityTue, 28 Feb 2017 10:05:23 +0000probability
http://gateoverflow.in/119954/probability
i am not able to understand "when to use poisson random variable" concept comparing to other random variables ...can somebody explain ....Numerical Abilityhttp://gateoverflow.in/119954/probabilityMon, 27 Feb 2017 23:04:14 +0000probability
http://gateoverflow.in/119894/probability
<p><img alt="" src="http://gateoverflow.in/?qa=blob&qa_blobid=15080373723529955280"></p>
<p>ANSWER I AM GETTING : <strong>(0.5) / [1-(0.5<sup>n</sup>)]</strong></p>
<p>ANSWER GIVEN : <strong>(0.5) / [ 1-(0.5<sup>n-1</sup>) ]</strong></p>Numerical Abilityhttp://gateoverflow.in/119894/probabilityMon, 27 Feb 2017 12:51:09 +0000sheldon ross
http://gateoverflow.in/119893/sheldon-ross
<p><strong>You know that a certain letter is equally likely to be in any one of three different folders. Let αi be the probability that you will find your letter upon making a quick examination of folder i if the letter is, in fact, in folder i, i = 1, 2, 3. (We may have αi < 1.) Suppose you look in folder 1 and do not find the letter. What is the probability that the letter is in folder 1?</strong></p>Probabilityhttp://gateoverflow.in/119893/sheldon-rossMon, 27 Feb 2017 12:49:54 +0000