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Recent questions tagged probability
Webpage for Probability
+1
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1
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1
self doubt
Raj tossed 3 dices and their results are noted down then what is the probability that Raj gets 10? I know the simple way to count the total favorable number of condition divide by (6^3). But it is timeconsuming to solve in the examination to count one by one favorable condition. So, solve by some short trick and give a generalized the formulae.
asked
5 days
ago
in
Numerical Ability
by
Raj Kumar 7
Junior
(
893
points)

33
views
probability
+1
vote
1
answer
2
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
(
431
points)

268
views
generalaptitude
numericalability
probability
0
votes
2
answers
3
probability ques
asked
Jun 11
in
Probability
by
Sambit Kumar
Active
(
4k
points)

51
views
probability
0
votes
1
answer
4
Gate_2019_Mock_Paper
Please explain
asked
Jun 7
in
Algorithms
by
Harikesh Kumar
Active
(
1.4k
points)

29
views
algorithms
datastructure
probability
strings
0
votes
2
answers
5
Sheldon ross Conditional probability
asked
Jun 6
in
Mathematical Logic
by
Prateek Raghuvanshi
Active
(
3.9k
points)

65
views
sheldonross
probability
0
votes
0
answers
6
Random
There are 6 pairs of black socks and 6 pairs of white socks.What is the probability to pick a pair of black or white socks when 2 socks are selected randomly in darkness. My thoughts: Since there have asked for probability to pick a "pair", we must consider those ... 6C1)/ 24C2 + (6C1 * 6C1)/ 24C2 = 6/23 Which is the correct approach and why? Why am I getting different results?
asked
Jun 5
in
Combinatory
by
Warlock lord
Active
(
3.4k
points)

31
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
(
905
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
(
86.4k
points)

91
views
probability
engineeringmathematics
+3
votes
1
answer
9
Quick Sort Algorithm
Let $0<α<.5$ be some constant (independent of the input array length $n$). What is the probability that, with a randomly chosen pivot element, the Partition subroutine produces a split in which the size of the smaller of the two subarrays is $≥α$ times the size of the original array? 1. $1  2*\alpha$ 2. $\alpha$ 3. $1  \alpha$ 4. $2  2*\alpha$
asked
May 23
in
Algorithms
by
Shailin Shah
(
109
points)

64
views
algorithms
probability
quicksort
0
votes
0
answers
10
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
(
86.4k
points)

45
views
probability
engineeringmathematics
0
votes
3
answers
11
#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
+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
0
votes
1
answer
13
Regarding Preparation
I know this question has been asked many times, but yeah. I am weak in calculus and linear algebra and have never studied probability properly. Now according to internet suggestions, I should read Kreyzig or BS Grewal, but I will most probably want ... time for GATE 2019 should i watch lectures of Gilbert Strang, Stats 110 and calculus textbook, or should i stick to kreyzig?
asked
May 11
in
Calculus
by
mohitjarvissharma
(
113
points)

74
views
engineeringmathematics
calculus
linearalgebra
probability
preparation
+1
vote
2
answers
14
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
(
86.4k
points)

116
views
probability
0
votes
0
answers
15
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
+1
vote
2
answers
16
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
17
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
(
86.4k
points)

82
views
probability
conditionalprobability
engineeringmathematics
+2
votes
1
answer
18
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
19
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
0
votes
0
answers
20
Probability and random variable
Consider the sets $A_1, A_2, A_3 \dots A_m$ each a subset of size $k$ of $\{1,2,3, \dots , n\}$. If in a 2colouring of $\{1,2,3, \dots , n\}$ no set $A_i$ is monochromatic, then show that $ m < 2^{k1}$.
asked
Apr 28
in
Set Theory & Algebra
by
Debashish Deka
Veteran
(
56.6k
points)

55
views
probability
randomvariable
combinatoricsiitb
0
votes
0
answers
21
Probability and set theory
Consider sets $A_1,A_2,A_3 \text{ to } A_m \text{ where }A_i \subseteq [n] \text{ and } [n] = \{1,2,3, \dots n \}$ such that there are no three distinct sets in the collection with the property $A_i \subset A_j \subset A_k.$ For even $n$, prove that \begin{align*} m ... bound on $m$ : \begin{align*} m \leq \binom{n}{\frac{n}{2}} + \binom{n}{\frac{n}{2}  1} \end{align*}
asked
Apr 27
in
Set Theory & Algebra
by
Debashish Deka
Veteran
(
56.6k
points)

27
views
probability
settheory
combinatoricsiitb
0
votes
0
answers
22
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
2
answers
23
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
(
16k
points)

92
views
isi2017
probability
0
votes
2
answers
24
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)

96
views
engineeringmathematics
probability
randomvariable
+1
vote
2
answers
25
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
(
16k
points)

93
views
iiithpgee
probability
+1
vote
1
answer
26
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
(
16k
points)

130
views
iiithpgee
probability
+1
vote
0
answers
27
Probability
murder takes place in an isolated village with 500 inhabitants. The police believe that red polyester fibers will have been transferred on to the murderer's clothes during the assault. Forensic experiments reveal that a probability of 0.9 can be assigned to such a transfer while the ... (a) P(guilt fibers present) (b) P(fibresguilt) (c) P(fibers) (d) P(guilt and fibers present).
asked
Apr 18
in
Mathematical Logic
by
Abhi Girin
(
439
points)

91
views
probability
conditionalprobability
+2
votes
2
answers
28
Sheldon Ross A first course in Probability
asked
Apr 17
in
Probability
by
Subham Nagar
Junior
(
533
points)

89
views
probability
sheldonross
+2
votes
3
answers
29
Probability Practice
Six balls are to be randomly chosen from an urn containing 8 red, 10 green, and 12 blue balls. What is the probability at least one red ball, one blue and one green ball is chosen?
asked
Apr 10
in
Probability
by
Mk Utkarsh
Boss
(
12.6k
points)

357
views
probability
+2
votes
1
answer
30
Sheldon Ross 3.13
Balls are randomly removed from an urn that initially contains 20 red and 10 blue balls. (a) What is the probability that all of the red balls are removed before all of the blue ones have been removed? Now suppose that the urn initially contains 20 red, 10 blue ... red, green? (d) What is the probability that the group of blue balls is the first of the three groups to be removed?
asked
Apr 10
in
Probability
by
Mk Utkarsh
Boss
(
12.6k
points)

132
views
probability
sheldonross
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