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Webpage for Probability
Recent questions tagged probability
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511
Random Question on prob
Two cards are drawn from a pack of 52 cards. The probability that they are a king and a queen is? a)16/260 b)26/260 c)16/1326 d)8/1326
Two cards are drawn from a pack of 52 cards. The probability that they are a king and a queen is?a)16/260b)26/260c)16/1326d)8/1326
Nandkishor3939
577
views
Nandkishor3939
asked
Jan 8, 2019
Probability
probability
+
–
2
votes
1
answer
512
GATE 2015 SET-2 Q 29
Let the random variable X represent the number of times a fair coin needs to be tossed till two consecutive heads appear for the first time. The expectation of X is _______.
Let the random variable X represent the number of times a fair coin needs to be tossed till two consecutive heads appear for the first time. The expectation of X is _____...
cocgame
3.8k
views
cocgame
asked
Jan 5, 2019
Probability
probability
usergate2015
usermod
expectation
+
–
1
votes
1
answer
513
MadeEasy Test Series: Probabilty - Probability
The probability of a man hitting a target in one fire is 1/6. The number of times at least he must fire at the target in order that his chance of hitting the target at least once will exceed 2/5 will be ?
The probability of a man hitting a target in one fire is 1/6. The number of times at least he must fire at the target in order that his chance of hitting the target at le...
Shamim Ahmed
491
views
Shamim Ahmed
asked
Jan 4, 2019
Probability
made-easy-test-series
probability
+
–
0
votes
1
answer
514
Kenneth Rosen Edition 7 Exercise 7.1 Question 14 (Page No. 451)
What is the probability that a five-card poker hand contains two pairs (that is, two of each of two different kinds and a fifth card of a third kind)?
What is the probability that a five-card poker hand contains two pairs (that is, two of each of two different kinds and a fifth card of a third kind)?
tusharp
425
views
tusharp
asked
Jan 4, 2019
Set Theory & Algebra
kenneth-rosen
discrete-mathematics
probability
+
–
0
votes
0
answers
515
Self Made[Variation to Gate 2004 Ques]
Let X and Y be two exponentially distributed and independent random variables with mean α and β, respectively. If Z = MAX (X,Y), then the mean of Z is given by
Let X and Y be two exponentially distributed and independent random variables with mean α and β, respectively.If Z = MAX (X,Y), then the mean of Z is given by
jatin khachane 1
280
views
jatin khachane 1
asked
Jan 3, 2019
Probability
engineering-mathematics
probability
+
–
1
votes
1
answer
516
UGC NET CSE | December 2018 | Part 2 | Question: 3
A box contains six red balls and four green balls. Four balls are selected at random from the box. What is the probability that two of the selected balls will be red and two will be in green? $\frac{1}{14}$ $\frac{3}{7}$ $\frac{1}{35}$ $\frac{1}{9}$
A box contains six red balls and four green balls. Four balls are selected at random from the box. What is the probability that two of the selected balls will be re...
Arjun
5.6k
views
Arjun
asked
Jan 2, 2019
Probability
ugcnetcse-dec2018-paper2
probability
+
–
0
votes
1
answer
517
UGC NET CSE | December 2018 | Part 2 | Question: 100
A full joint distribution for the Toothache, Cavity and Catch is given in the table below. Toothache $\neg$ Toothache Catch $\neg$ Catch Catch $\neg$ Catch Cavity $0.108$ $0.012$ $0.072$ $0.008$ $\neg$ Cavity $0.016$ $0.064$ $0.144$ $0.576$ What is ... $\langle 0.4, 0.8\rangle$ $\langle 0.6, 0.8\rangle$ $\langle 0.6, 0.4\rangle$
A full joint distribution for the Toothache, Cavity and Catch is given in the table below. Toothache$\neg$ ToothacheCatch$\neg$ CatchCatch$\neg$ CatchCavity$0.108$$0.012$...
Arjun
2.5k
views
Arjun
asked
Jan 2, 2019
Probability
ugcnetcse-dec2018-paper2
joint-distribution
probability
non-gate
+
–
2
votes
1
answer
518
MadeEasy Full Length Test 2019: General Aptitude - Probability
A packet of 20 batteries is known to include 4 batteries that are defective. If 8 batteries are randomly chosen and tested, the probability that finding among them not more than 1 defective is Ans: 0.5033 Solution provided: How can we apply Binomial distribution ...
A packet of 20 batteries is known to include 4 batteries that are defective. If 8 batteries are randomly chosen and tested, the probability that finding among them not mo...
MiNiPanda
1.4k
views
MiNiPanda
asked
Jan 1, 2019
Quantitative Aptitude
general-aptitude
quantitative-aptitude
probability
made-easy-test-series
+
–
0
votes
1
answer
519
MadeEasy Test Series: Computer Networks - Lan Technologies
If probability of frame reaching safely is 0.1 then mean number of transmissions of a frame to make it success is _____. what is wrong with the approach given below random variable x is the number of transmission' X 1 2 3 4 so on P(X ... which comes out to be 100. but given the answer is 10 using 1/p. (what is wrong in above aproach?)
If probability of frame reaching safely is 0.1 then mean number of transmissions of a frame to make it success is _____. what is wrong with the approach given below‘ran...
newdreamz a1-z0
522
views
newdreamz a1-z0
asked
Dec 31, 2018
Computer Networks
made-easy-test-series
probability
lan-technologies
computer-networks
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–
0
votes
0
answers
520
hashing
A) (1-(N / K)) ^ r b) (1-(K / N)) ^ r c) (1+(N / K)) ^ r-1 d) (1-(K / N)) ^ r-1
A) (1-(N / K)) ^ r b) (1-(K / N)) ^ r c) (1+(N / K)) ^ r-1 d) (1-(K / N)) ^ r-1
Rahul_Rathod_
413
views
Rahul_Rathod_
asked
Dec 28, 2018
DS
hashing
data-structures
probability
uniform-hashing
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4
votes
2
answers
521
GATE Overflow | Mock GATE | Test 1 | Question: 5
A book contains $100$ pages. A page is chosen at random. What is the chance that the sum of the digits on the page is equal to $8$? $0.08$ $0.09$ $0.90$ $0.10$
A book contains $100$ pages. A page is chosen at random. What is the chance that the sum of the digits on the page is equal to $8$?$0.08$$0.09$$0.90$$0.10$
Ruturaj Mohanty
3.2k
views
Ruturaj Mohanty
asked
Dec 27, 2018
Quantitative Aptitude
go-mockgate-1
engineering-mathematics
probability
quantitative-aptitude
+
–
1
votes
1
answer
522
GATE Overflow | Mock GATE | Test 1 | Question: 23
What is the minimum number of people that must be there in a room to make the probability of two people having same birthday be at least 50%? Assume a year has $365$ days and the probability distribution is uniform throughout. $23$ $182$ $183$ $123$
What is the minimum number of people that must be there in a room to make the probability of two people having same birthday be at least 50%? Assume a year has $365$ day...
Ruturaj Mohanty
1.0k
views
Ruturaj Mohanty
asked
Dec 27, 2018
Probability
go-mockgate-1
engineering-mathematics
probability
easy
+
–
3
votes
1
answer
523
GATE Overflow | Mock GATE | Test 1 | Question: 42
An urn contains $m$ WHITE and $n$ BLACK balls. A ball is drawn at random and is put back into the urn along with $k$ additional balls of the same color as that of the ball drawn. If now a ball is drawn, the probability that it is WHITE is? $(m+k)/(m+n+k)$ $(n+k)/(m+n+k)$ $m/(m+n+k)$ $m/(m+n)$
An urn contains $m$ WHITE and $n$ BLACK balls. A ball is drawn at random and is put back into the urn along with $k$ additional balls of the same color as that of the bal...
Ruturaj Mohanty
683
views
Ruturaj Mohanty
asked
Dec 27, 2018
Probability
go2019-flt
engineering-mathematics
conditional-probability
probability
+
–
4
votes
2
answers
524
GATE Overflow | Mock GATE | Test 1 | Question: 44
For two data sets, each of size $5$, the variances are given to be $4$ and $5$ and the corresponding means are given to be $2$ and $4$ respectively. The variance of the combined data is? $11/2$ $6$ $13/2$ $5/2$
For two data sets, each of size $5$, the variances are given to be $4$ and $5$ and the corresponding means are given to be $2$ and $4$ respectively. The variance of the c...
Ruturaj Mohanty
946
views
Ruturaj Mohanty
asked
Dec 27, 2018
Probability
go-mockgate-1
quantitative-aptitude
statistics
variance
probability
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–
2
votes
3
answers
525
GATE Overflow | Mock GATE | Test 1 | Question: 53
A class of first year B.tech students is composed of four batches A, B, C and D, each consisting of $30$ students. It is found that the sessional marks of students in Engineering Drawing in batch C have a mean of $6.6$ and standard deviation of $2.3$. ... this, the marks of a student in batch C are changed from $8.5$ to $8.75$ $7.45$ $9.27$ $8.97$
A class of first year B.tech students is composed of four batches A, B, C and D, each consisting of $30$ students. It is found that the sessional marks of students in Eng...
Ruturaj Mohanty
1.4k
views
Ruturaj Mohanty
asked
Dec 27, 2018
Probability
go-mockgate-1
engineering-mathematics
probability
statistics
+
–
0
votes
0
answers
526
Intuition behind the independence of two set when probability of one set is 0
I learnt that if probability of an event is 0 then this is independent of all other events and mathematics also second that statement. Can anyone explain the intuition behind it
I learnt that if probability of an event is 0 then this is independent of all other events and mathematics also second that statement.Can anyone explain...
newbie
818
views
newbie
asked
Dec 24, 2018
Probability
probability
+
–
0
votes
0
answers
527
Testbook Test Series: Probability - Probability
The probability of a shooter hitting the target is $\frac{1}{3}$ and three shots at the bull's eye are needed to win the game. What could be the least number of shots for the shooter to give him more than half-chance of winning the game$?$ $A)5$ $B)6$ $C)7$ $D)8$
The probability of a shooter hitting the target is $\frac{1}{3}$ and three shots at the bull's eye are needed to win the game. What could be the least number of shots for...
Lakshman Bhaiya
818
views
Lakshman Bhaiya
asked
Dec 23, 2018
Probability
testbook-test-series
engineering-mathematics
probability
+
–
7
votes
1
answer
528
TIFR CSE 2019 | Part A | Question: 4
What is the probability that a point $P=(\alpha,\beta)$ picked uniformly at random from the disk $x^2 +y^2 \leq 1$ satisfies $\alpha + \beta \leq 1$? $\frac{1}{\pi}$ $\frac{3}{4} + \frac{1}{4} \cdot \frac{1}{\pi}$ $\frac{3}{4}+ \frac{1}{4} \cdot \frac{2}{\pi}$ $1$ $\frac{2}{\pi}$
What is the probability that a point $P=(\alpha,\beta)$ picked uniformly at random from the disk $x^2 +y^2 \leq 1$ satisfies $\alpha + \beta \leq 1$?$\frac{1}{\pi}$$\frac...
Arjun
1.7k
views
Arjun
asked
Dec 18, 2018
Probability
tifr2019
engineering-mathematics
discrete-mathematics
probability
+
–
8
votes
1
answer
529
TIFR CSE 2019 | Part A | Question: 14
A drawer contains $9$ pens, of which $3$ are red, $3$ are blue, and $3$ are green. The nine pens are drawn from the drawer one at at time (without replacement) such that each pen is drawn with equal probability from the remaining pens in the drawer. What is ... that two red pens are drawn in succession ? $7/12$ $1/6$ $1/12$ $1/81$ $\text{None of the above}$
A drawer contains $9$ pens, of which $3$ are red, $3$ are blue, and $3$ are green. The nine pens are drawn from the drawer one at at time (without replacement) such that ...
Arjun
2.3k
views
Arjun
asked
Dec 18, 2018
Probability
tifr2019
engineering-mathematics
probability
conditional-probability
+
–
0
votes
0
answers
530
Testbook Test Series: Probability - Probability
Chandler is selling tickets for \$1 per ticket. In the queue for tickets, there are m people with a single \$ ... (m+1) (b) 2 / (m+1) (c) 18 / (m)(m+1)(m+2) (d) (m-2) / (m+2)
Chandler is selling tickets for \$1 per ticket. In the queue for tickets, there are ‘m‘ people with a single \$1 coin and 2 with a \$2 coin. Each person in the queue ...
Rajat Agrawal007
312
views
Rajat Agrawal007
asked
Dec 8, 2018
Probability
testbook-test-series
engineering-mathematics
probability
+
–
1
votes
0
answers
531
GATE ECE 2014
aditi19
340
views
aditi19
asked
Dec 8, 2018
Probability
2014-ece
probability
uniform-distribution
+
–
3
votes
1
answer
532
NIELIT 2018-14
A continuous random variable $x$ is distributed over the interval $[0,2]$ with probability density function $f(x) =ax^2 +bx$, where $a$ and $b$ are constants. If the mean of the distribution is $\frac{1}{2}$. Find the values of the constants $a$ and $b$. $a=2, b=- \frac{13}{6}$ $a= – \frac{15}{8}, b=3$ $a= – \frac{29}{6}, b=2$ $a=3, b= – \frac{7}{2}$
A continuous random variable $x$ is distributed over the interval $[0,2]$ with probability density function $f(x) =ax^2 +bx$, where $a$ and $b$ are constants. If the mean...
Arjun
2.3k
views
Arjun
asked
Dec 7, 2018
Probability
nielit-2018
engineering-mathematics
probability
random-variable
+
–
3
votes
1
answer
533
NIELIT 2018-24
If $f(x)=k$ exp, $\{ -(9x^2-12x+13)\}$, is a $p, d, f$ of a normal distribution ($k$, being a constant), the mean and standard deviation of the distribution: $\mu = \frac{2}{3}, \sigma = \frac{1}{3 \sqrt{2}}$ $\mu = 2, \sigma = \frac{1}{\sqrt{2}}$ $\mu = \frac{1}{3}, \sigma = \frac{1}{3 \sqrt{2}}$ $\mu = \frac{2}{3}, \sigma = \frac{1}{ \sqrt{3}}$
If $f(x)=k$ exp, $\{ -(9x^2-12x+13)\}$, is a $p, d, f$ of a normal distribution ($k$, being a constant), the mean and standard deviation of the distribution:$\mu = \frac{...
Arjun
1.6k
views
Arjun
asked
Dec 7, 2018
Probability
nielit-2018
engineering-mathematics
probability
normal-distribution
+
–
2
votes
0
answers
534
NIELIT 2018-26
If $P(A \cap B) = \frac{1}{2}, \: P(\overline{A} \cap \overline{B}) = \frac{1}{2}$ and $2P(A)=P(B)=p$, then the value of $p$ is given by: $\frac{1}{4}$ $\frac{1}{2}$ $\frac{1}{3}$ $\frac{2}{3}$
If $P(A \cap B) = \frac{1}{2}, \: P(\overline{A} \cap \overline{B}) = \frac{1}{2}$ and $2P(A)=P(B)=p$, then the value of $p$ is given by:$\frac{1}{4}$$\frac{1}{2}$$\frac{...
Arjun
935
views
Arjun
asked
Dec 7, 2018
Probability
nielit-2018
engineering-mathematics
probability
+
–
2
votes
0
answers
535
Kenneth Rosen Edition 7 Exercise 7.2 Question 24 (Page No. 467)
What is the conditional probability that exactly four heads appear when a fair coin is flipped five times, given that the first flip came up heads? shouldn't the answer be 1/16? my approach probability that we get 4 head after 4 toss=(1/2)^4 probability ... B)/P(B)=$\frac{(1/2)^4*1/2}{1/2}$ answer is given ¼? where am I going wrong?
What is the conditional probability that exactly four heads appear when a fair coin is flipped five times, given that the first flip came up heads?shouldn’t the answer ...
aditi19
594
views
aditi19
asked
Dec 1, 2018
Probability
kenneth-rosen
discrete-mathematics
probability
conditional-probability
+
–
0
votes
0
answers
536
Rosen
what is the probability that in a group of n people chosen at random, there are atleast two people born in the same month of the year?
what is the probability that in a group of n people chosen at random, there are atleast two people born in the same month of the year?
aditi19
463
views
aditi19
asked
Dec 1, 2018
Probability
kenneth-rosen
probability
+
–
1
votes
0
answers
537
Doubt on conditional probability
It had been found from past experience that of the articles produced by a factory, 20% comes from Machine 1; 30% comes from Machine 2 and 50% from Machine 3. The percentages of satisfactory articles among those produced are 95 for machine 1, ... that is satisfactory? ii) Assume the article is satisfactory. What is the probability that it was produced by machine 1?
It had been found from past experience that of the articles produced by a factory, 20% comes from Machine 1; 30% comes from Machine 2 and 50% from Machine 3. The percenta...
Tuhin Dutta
546
views
Tuhin Dutta
asked
Nov 30, 2018
Probability
probability
conditional-probability
engineering-mathematics
+
–
0
votes
1
answer
538
Doubt on probability
15 students among whom are A and B arranged randomly in a row. Obtain the probability that there will be 3 students between A and B?
15 students among whom are A and B arranged randomly in a row. Obtain the probability that there will be 3 students between A and B?
Tuhin Dutta
356
views
Tuhin Dutta
asked
Nov 30, 2018
Probability
probability
engineering-mathematics
+
–
1
votes
1
answer
539
Probability
The probability of a student passing an exam is 0.1. What is the probability that he passes the exam in the 3rd attempt? Please explain in details. I am confused about these two approaches: Approach 1: P(passing in 3rd attempt)=P(failed in 1st)*P(failed in 2nd ... pass rate will always remain constant no matter on which attempt he is trying. ie. Answer = 0.1 Which one is wrong and why?
The probability of a student passing an exam is 0.1. What is the probability that he passes the exam in the 3rd attempt? Please explain in details. I am confused about th...
punkprincess
324
views
punkprincess
asked
Nov 28, 2018
Probability
probability
+
–
0
votes
0
answers
540
Probability
From a deck of 52 cards, what is the probability of picking 2 kings: a)With replacement B)Without replacement Please explain in details. I am new to probability. Thank you. :)
From a deck of 52 cards, what is the probability of picking 2 kings:a)With replacementB)Without replacement Please explain in details. I am new to probability. Thank you....
punkprincess
172
views
punkprincess
asked
Nov 28, 2018
Probability
probability
engineering-mathematics
+
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