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Recent questions in Probability
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Random variables,
Uniform,
Normal,
Exponential,
Poisson
and
Binomial distributions.
Mean, median, mode and standard deviation.
Conditional probability and Bayes theorem
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0
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1
General
From last few days I am trying to solve Sheldon Ross problems. But not able to solve it. So those who have solved it kindly tell me how to strengthen the concepts as to solve the problems...........and also is the level of problems given in it are as per GATE requirement??
asked
6 days
ago
in
Probability
by
mbisht
(
161
points)

7
views
0
votes
0
answers
2
Sheldon Ross Chapter 2
If it is assumed that all (52 5) poker hands are equally likely, what is the probability of being dealt (a) a ﬂush? (A hand is said to be a ﬂush if all 5 cards are of the same suit.) (b) one pair? (This occurs when the cards have denominations a, a, ... distinct.) (c) two pairs? (This occurs when the cards have denominations a, a, b, b, c, wherea, b, andc are all distinct.)
asked
Jun 13
in
Probability
by
mbisht
(
161
points)

4
views
0
votes
0
answers
3
Sheldon Ross Chapter 2
If it is assumed that all (525) poker hands are equally likely, what is the probability of being dealt (a) a ﬂush? (A hand is said to be a ﬂush if all 5 cards are of the same suit.) (b) one pair? (This occurs when the cards have denominations a, a, b ... distinct.) (c) two pairs? (This occurs when the cards have denominations a, a, b, b, c, wherea, b, andc are all distinct.)
asked
Jun 13
in
Probability
by
mbisht
(
161
points)

5
views
+1
vote
1
answer
4
Mission IIT Screening Test
In a group of $11$ people what is the probability that at least two people have birthday on same day ?
asked
Jun 11
in
Probability
by
Naveen Kumar 3
(
449
points)

275
views
generalaptitude
numericalability
probability
+1
vote
2
answers
5
Mission IIT Screening Test
Raju and Rani are playing betting game. Raju rolls a dice and if 5 comes on face then they stop the game, else Raju needs to pay 1 rupee ro Rani and continue rolling. Expected no of rupees Rani gets in this game?
asked
Jun 11
in
Probability
by
Naveen Kumar 3
(
449
points)

70
views
0
votes
2
answers
6
probability ques
asked
Jun 11
in
Probability
by
Sambit Kumar
Active
(
4k
points)

52
views
probability
0
votes
0
answers
7
Made easy test
Consider Ramesh purchase a product of Patanjali. The manual on it states that the lifetime $T$ of product is defined as the amount of time (in years) the product works properly until it breaks down, satisfy following equation : $$P(T \geq t) = e^{t/4}, \text{for all } t \geq 0$$ The probability that it breaks down in $3^{rd}$ year is ______. (Upto $2$ decimal places)
asked
May 31
in
Probability
by
saumya mishra
Junior
(
921
points)

55
views
engineeringmathematics
probability
0
votes
2
answers
8
Probability
The chances that doctor A will diagnose a disease X correctly is 60%. The chances that a patient will die by his treatment after correct diagnosis is 40% and the chances of death by wrong diagnosis is 70%. A patient of doctor A, who had disease X, died. The chances that his disease was diagnosed correctly is ________%.
asked
May 24
in
Probability
by
srestha
Veteran
(
86.6k
points)

95
views
probability
engineeringmathematics
0
votes
0
answers
9
Probability Density Function
Given a probability density function $\frac{1}{x}$. Value exists in the interval $\left ( 2,3 \right )$ Can this pdf has existence outside this range?
asked
May 18
in
Probability
by
srestha
Veteran
(
86.6k
points)

46
views
probability
engineeringmathematics
0
votes
3
answers
10
#cdssampleTest
One in two hundred people in a population have a particular disease. A test is developed for the disease. The test gives a false positive $3\%$ of the time (i.e. reports that a person has the disease even when he/she does not), and a false ... disease even when he/she does). Rahul takes the test and the report comes positive. What is the probability that Rahul has the disease?
asked
May 17
in
Probability
by
parulk
Junior
(
527
points)

110
views
engineeringmathematics
probability
0
votes
2
answers
11
CMI 2018 (Probability)
Suppose you have two coins $A$ and $B$ the probability of head in $A$ is $\dfrac{1}{4}$ and the probability of head in $B$ is $\dfrac{3}{4}$. Now, suppose you have chosen a coin and tossed it two times. The output was head and head. What is the probability that you chose the coin $B$.
asked
May 16
in
Probability
by
Sammohan Ganguly
(
417
points)

104
views
usercmi2018
usermod
+1
vote
1
answer
12
CMI 2018 Objective
Suppose Kn be the number of strings having n X's and n Y's such that in all the prefixes of a string the number of X's is greater than the number of Y's. Now suppose you are standing at an edge of a swimming pool. You have a bag of n red and n blue balls.Now you are ... the probability that you will not get wet. A) Kn / (2nCn) B) n Kn / (2nCn) C) Kn / (2n)! d) n kn / 22n
asked
May 16
in
Probability
by
Sammohan Ganguly
(
417
points)

86
views
probability
usercmi2018
usermod
+1
vote
2
answers
13
Modification of GATE question
A coin tossed 3 times 1) if output at last two toss is $HT$ then stop tossing 2) if output of last two toss is $TT$ then toss again and go to step 1 or step 3 3) if output of last two toss is $TH$ or $HH$ then toss again and goto step 2 What will be probability, that at last the coin will stop tossing?
asked
May 9
in
Probability
by
srestha
Veteran
(
86.6k
points)

116
views
probability
0
votes
0
answers
14
IIT M Written : Probability
An experiment is performed $n$ times, in each of which an event $X$ may occur with a probability $p$. Determine$ E[ \overline{X}]$ and $Var( \overline{X})$, where $\overline{X} $is the complement of the event $X$
asked
May 7
in
Probability
by
Sourajit25
Junior
(
787
points)

71
views
writtentest
iitmadras
probability
expectedvalue
0
votes
0
answers
15
IIT M Written Test
Any Hints on how to solve this?
asked
May 7
in
Probability
by
Sourajit25
Junior
(
787
points)

41
views
writtentest
iitmadras
linearregression
0
votes
0
answers
16
Universality of Uniform
According to Universality of Uniform , We can get from the uniform distribution to the other distributions and also from other distributions back to the uniform distribution. Please explain how we would simulate from one distribution to other distribution ?
[closed]
asked
May 6
in
Probability
by
ankitgupta.1729
Loyal
(
6k
points)

30
views
randomvariable
uniformdistribution
+1
vote
2
answers
17
Doubt
Suppose we are playing a game.You have to choose 1 out 3 doors.Behind 1 lucky door ,we have 1 million dollars.You picked 1 st door.But i opened the 3rd door and found nothing.Now,if i give you another chance ,will you change your choice? (Use probabiliy estimates to answer)
asked
May 6
in
Probability
by
Angkit
Active
(
3.8k
points)

103
views
probability
0
votes
2
answers
18
Bayes theorem
This is extended form of Bayes theorem Can somebody explain (or can prove), how from 1st line 2 line came?
asked
May 5
in
Probability
by
srestha
Veteran
(
86.6k
points)

82
views
probability
conditionalprobability
engineeringmathematics
+1
vote
0
answers
19
Intermediate Conting and Probability
Solve
asked
May 4
in
Probability
by
srestha
Veteran
(
86.6k
points)

45
views
permutationsandcombinations
0
votes
1
answer
20
Intermediate Conting and Probability(David Patrick)
asked
May 4
in
Probability
by
srestha
Veteran
(
86.6k
points)

49
views
permutationsandcombinations
+2
votes
1
answer
21
IISc CDS(MTech R)
There are 12 pair of shoes, what is the probability that atleast one complete pair of shoes are present if 4 shoes are selected at random?
asked
May 3
in
Probability
by
Hakuna Matata
(
317
points)

158
views
iisc
cds
probability
mtechr
+3
votes
0
answers
22
A First Course in Probability 8th Edition: Axioms of Probability Example 5k
asked
Apr 29
in
Probability
by
Sagnik Chatterjee
(
85
points)

70
views
permutationsandcombinations
sheldonross
probability
engineeringmathematics
+2
votes
2
answers
23
IIT Kanpur Test Sample Paper
(Overfed pets) The Jones family have n pet cats. The caretaker who is charged to feed these cats is very careless. Everytime he goes into the pet zone, he takes food along and feeds a random cat  he does not care whether the cat seems to be hungry ... expectation, how many more trips would he have to make before he feeds one of the unfed (n− k) cats for the first time?
asked
Apr 29
in
Probability
by
Churchill Khangar
Active
(
2.1k
points)

193
views
iitkanpur
writtentest
mtech
0
votes
1
answer
24
IIT Kanpur Test Sample Paper
(Batman and Robin) The city of Gotham keeps propping up newer challenges for our dynamic duo. The criminals in the city are so organized that they have come up with a schedule to commit the crimes. a. The Mad Hatter commits maddeningly despicable ... . What is the probability of that? 4) In the above scenario, what is the probability that two criminals get defeated?
asked
Apr 29
in
Probability
by
Churchill Khangar
Active
(
2.1k
points)

106
views
iitkanpur
writtentest
mtech
0
votes
0
answers
25
Probability
Prove for a positive integer valued random variable, $X$ , and for positive integers $a < b$ \begin{align*} &P(X \geq b) \leq \left [ \left ( \frac{E(X)}{b} \right )  P(a \leq X < b)\cdot \left ( \frac{a}{b} \right ) \right ] \\ \end{align*}
asked
Apr 27
in
Probability
by
Debashish Deka
Veteran
(
56.6k
points)

26
views
probability
combinatoricsiitb
0
votes
1
answer
26
isi_kolkata
E1 and E2 are two events such that P(E1) = 0.2 and P(E2) = 0.5. What are the minimum and maximum possible values of P(E1c  E2c)? (A) 0 and 0.6 (B) 0.4 and 0.6 (C) 0.4 and 1 (D) 0.6 and 1
asked
Apr 25
in
Probability
by
Ajeet Singh
(
107
points)

61
views
0
votes
2
answers
27
ISI2017MMA27
A box contains $5$ fair and $5$ biased coins. Each biased coin has a probability of head $\frac{4}{5}$. A coin is drawn at random from the box and tossed. Then the second coin is drawn at random from the box ( without replacing the first one). Given that the first coin has shown ... that the second coin is fair, is $\frac{20}{39}$ $\frac{20}{37}$ $\frac{1}{2}$ $\frac{7}{13}$
asked
Apr 24
in
Probability
by
Tesla!
Boss
(
16.1k
points)

93
views
isi2017
probability
0
votes
2
answers
28
Maths: Probability Distribution
Suppose X is a uniform random variable between 0.50 and 1.00. What is the probability that a randomly selected value of X is between 0.55 and 0.60 or between 0.75 and 0.85? A. 0.00 B. 0.15 C. 0.60 D. 0.30
asked
Apr 22
in
Probability
by
blind00x
(
27
points)

97
views
engineeringmathematics
probability
randomvariable
+1
vote
2
answers
29
PGEE 2018
Three person plays a game by tossing a coin, if atleast one of the outcome is different from another end is declared, coins are biased with probability of head is 1/4 what is probability that game ends in first round
asked
Apr 21
in
Probability
by
Tesla!
Boss
(
16.1k
points)

93
views
iiithpgee
probability
+1
vote
1
answer
30
PGEE 2018
4 person wearing different hat went to restaurant, they gave there hat to manager, manager has habit of forgetting thing while returning manager gave hat back to each person, probability that none of the person gets there respective hats is ?
asked
Apr 21
in
Probability
by
Tesla!
Boss
(
16.1k
points)

131
views
iiithpgee
probability
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