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Recent questions tagged probability
Webpage for Probability
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1
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1
CMI Data Science 2018 (Probability)
asked
Apr 14
in
Probability
by
Sayan Bose
Loyal
(
6.2k
points)

50
views
usercmi2018
probability
0
votes
0
answers
2
PGCET2010CS
The expected value of a probability function, when probability is measured on a scale of 0 to 1, coincides with it's (a) Mean (b) Variance (c) Standard deviation (d) None of them
asked
Apr 9
in
Probability
by
Prajna
(
77
points)

25
views
probability
0
votes
0
answers
3
SHELDON AND ROSS
Twelve percent of all US households are in California. A total of 3.3 percent of all US households earn over 250000 per year, while a total of 6.3 percent California households earn over 250000 per year. If a randomly chosen US household earns over 250,000 per year, ... 10^(3)/(0.033)=0.2291 But the answer given in the instructors manual is .2066 What is wrong with my logic??
asked
Mar 22
in
Probability
by
Doraemon
(
195
points)

24
views
probability
sheldonross
0
votes
0
answers
4
Andrew S. Tanenbaum Edition 5th Exercise 3 Question 13 (Page No. 252)
A block of bits with n rows and k columns uses horizontal and vertical parity bits for error detection. Suppose that exactly 4 bits are inverted due to transmission errors. Derive an expression for the probability that the error will be undetected.
asked
Mar 16
in
Computer Networks
by
ajaysoni1924
Loyal
(
9.6k
points)

7
views
computernetworks
datalinklayer
errordetection
tanenbaum
probability
0
votes
2
answers
5
Probability  Independent Events
What is the probability that, in six throws of a die, there will be exactly one each of “1”, “2”, “3”, “4”, “5” and “6”? $0.00187220$ $0.01432110$ $0.01176210$ $0.01543210$
asked
Mar 8
in
Probability
by
zeeshanmohnavi
Junior
(
857
points)

58
views
probability
engineeringmathematics
0
votes
0
answers
6
Hashing
Consider an open address hash table with uniform hashing. Out of 10 locations, 8 are occupied. What are the expected number of probes in an unsuccessful and successful search respectively?
asked
Mar 6
in
Algorithms
by
s_dr_13
(
133
points)

66
views
hashing
datastructure
uniformhashing
probability
0
votes
0
answers
7
Discrete random variable
asked
Feb 20
in
Probability
by
Na462
Loyal
(
8.7k
points)

78
views
probability
randomvariable
engineeringmathematics
0
votes
0
answers
8
Central limit theorem
(Central Limit Theorem) Let X1, X2, . . . , X81 be i.i.d., each with expected value µ = E(Xi) = 5, and variance σ2 = Var(Xi) = 4. Approximate P(X1 + X2 +· · · X81 > 369), using the central limit theorem.
asked
Feb 19
in
Probability
by
Na462
Loyal
(
8.7k
points)

28
views
probability
0
votes
1
answer
9
Grewal
Suppose avg waiting time of a process to get chance in a queue is 5 min. What will the probability that process get chance at first minute is ________________
asked
Feb 19
in
Probability
by
srestha
Veteran
(
111k
points)

52
views
probability
+1
vote
0
answers
10
Probability density function
Let R be the rate at which customers are served in a queue. Suppose that R is exponential with pdf f(r) = 2e^(−2r) on [0, ∞). Find the pdf of the waiting time per customer T = 1/R.
asked
Feb 19
in
Probability
by
Na462
Loyal
(
8.7k
points)

21
views
engineeringmathematics
probability
0
votes
0
answers
11
Expectation
Suppose 100 people all toss a hat into a box and then proceed to randomly pick out a hat. What is the expected number of people to get their own hat back. Hint: express the number of people who get their own hat as a sum of random variables whose expected value is easy to compute.
asked
Feb 19
in
Probability
by
Na462
Loyal
(
8.7k
points)

45
views
#probability#expectation
probability
0
votes
1
answer
12
Conditional Probability
A multiple choice exam has 4 choices for each question. A student has studied enough so that the probability they will know the answer to a question is 0.5, the probability that they will be able to eliminate one choice is 0.25, otherwise ... the test to measure what the student knows. If the student answers a question correctly what's the probability they knew the answer?
asked
Feb 18
in
Probability
by
Na462
Loyal
(
8.7k
points)

163
views
conditionalprobability
probability
0
votes
1
answer
13
JEST 2019
Three dice are rolled independently. Probability of obtaining the difference from largest and smallest number as exactly 4 :
asked
Feb 18
in
Probability
by
Sayan Bose
Loyal
(
6.2k
points)

87
views
jest
probability
0
votes
1
answer
14
JEST Sample Question 1c
If a fair die (with 6 faces) is cast twice, what is the probability that the two numbers obtained differ by 2? (A) 1/12 (B) 1/6 (C) 2/9 (D) 1/2
asked
Feb 15
in
Probability
by
sripo
Active
(
2.6k
points)

45
views
jest
probability
discretemathematics
+1
vote
0
answers
15
JEST Sample Question6
Two gamblers have an argument. The first one claims that if a fair coin is tossed repeatedly, getting two consecutive heads is very unlikely. The second, naturally, is denying this. They decide to settle this by an actual trial; if, within n coin tosses, ... demonstrated. What happens for larger values of n? Is it true that P (n) only increases with n? Justify your answer.
asked
Feb 15
in
Probability
by
sripo
Active
(
2.6k
points)

25
views
jest
engineeringmathematics
probability
0
votes
1
answer
16
A family has two children. Given that one of the children is a boy, what is the probability that both children are boys?
asked
Feb 14
in
Probability
by
ShubhamSwarnkar
(
27
points)

147
views
probability
0
votes
1
answer
17
Probability
Bob has a peculiar pair of foursided dice. When he rolls the dice, the probability of any particular outcome is proportional to the sum of the results of each die. All outcomes that result in a particular sum are equally likely. (a) What is the probability of the ... Here what do we mean by the line  any particular outcome is proportional to the sum of the results of each die.
asked
Feb 13
in
Probability
by
DIYA BASU
(
289
points)

17
views
probability
+2
votes
2
answers
18
GATE201920
An array of $25$ distinct elements is to be sorted using quicksort. Assume that the pivot element is chosen uniformly at random. The probability that the pivot element gets placed in the worst possible location in the first round of partitioning (rounded off to $2$ decimal places) is ________
asked
Feb 7
in
Algorithms
by
Arjun
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(
396k
points)

2.6k
views
gate2019
numericalanswers
algorithms
quicksort
probability
+3
votes
4
answers
19
GATE201922
Two numbers are chosen independently and uniformly at random from the set {1,2,….,13}. The probability (rounded off to 3 decimal places) that their 4bit (unsigned) binary representations have the same most significant bit is _______________.
asked
Feb 7
in
Digital Logic
by
Arjun
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(
396k
points)

4k
views
gate2019
numericalanswers
digitallogic
numberrepresentation
probability
+4
votes
3
answers
20
GATE201947
Suppose $Y$ is distributed uniformly in the open interval $(1,6)$. The probability that the polynomial $3x^2 +6xY+3Y+6$ has only real roots is (rounded off to $1$ decimal place) _______
asked
Feb 7
in
Probability
by
Arjun
Veteran
(
396k
points)

2.3k
views
gate2019
numericalanswers
engineeringmathematics
probability
uniformdistribution
+1
vote
3
answers
21
GATE 2019 23
Q.23 Two numbers are chosen independently and uniformly at random from the set (1, 2,..., 13]. The probability (rounded off to 3 decimal places) that their 4bit (unsigned) binary representations have the same most significant bit is
asked
Feb 7
in
Probability
by
Ram Swaroop
Active
(
2.6k
points)

570
views
usergate2019
usermod
probability
numericalanswers
normal
0
votes
1
answer
22
Ace Test Series: Probability  Uniform Distribution
asked
Feb 2
in
Probability
by
Na462
Loyal
(
8.7k
points)

85
views
randomvariable
probability
expectation
uniformdistribution
acetestseries
0
votes
0
answers
23
GeeksforGeeks
Suppose that the running time for each process in milliseconds is an exponential random variable with parameter λ=1/20. If process P1 arrives immediately ahead of the process P2 in the running state, then the probability that process P2 will have to wait more than 20 milliseconds is ... . A 0.274 B 0.324 C 0.428 D 0.368 How to approach this. even not able to understand the question.
asked
Jan 27
in
Operating System
by
Ashish Goyal
(
423
points)

33
views
engineeringmathematics
randomvariable
probability
0
votes
0
answers
24
GATEEY2018 Q53
The probability that a bush has a cricket is 0.1. The probability of a spider being present on a bush is 0.2. When both a spider and a cricket are present on a bush, the probability of encountering each other is 0.2. The probability of a spider consuming a ... a cricket is preyed on by a spider is ____ (answer up to 3 decimal places). Is it multiplication of everything i.e. 0.002.
asked
Jan 26
in
Probability
by
Barney Ross
(
315
points)

61
views
probability
usergate2018
usermod
0
votes
1
answer
25
MadeEasy Test Series : Probability  Probability
A dice is tossed thrice. A success is getting ‘1 or 6' on a toss. Find the variance of number of successes _. Answer 0.66
asked
Jan 24
in
Probability
by
Ram Swaroop
Active
(
2.6k
points)

115
views
engineeringmathematics
probability
madeeasytestseries
+1
vote
0
answers
26
Applied Course Mock Test 4
Q32 [Mock 4]. Naveen's coin box contains 8 fair standard coins (heads and tails) and 1 coin which has heads on both sides. He selects a coin randomly and flips it 4 times, getting all heads. If he flips this coin again, what is the probability it ... )+(1/9)*(1) Probability of choosing fair coin and P(heads)+ P(unfair)*P(heads). Please help me understand this question.
asked
Jan 22
in
Probability
by
great_gater
(
299
points)

115
views
conditionalprobability
probability
discretemathematics
0
votes
0
answers
27
probability
Probability density function of a random variable X is distributed uniformly between 0 and 10 The probability that X lies between 2.5 to 7.5 and the mean square value of X are respectively. please give step by step answer in a detailed manner.
asked
Jan 21
in
Probability
by
learner_geek
Active
(
3.8k
points)

62
views
probability
engineeringmathematics
randomvariable
conditionalprobability
0
votes
2
answers
28
probability
In a lottery, 10 tickets are drawn at random out of 50 tickets numbered from 1 to 50. What is the expected value of the sum of numbers on the drawn tickets?
asked
Jan 20
in
Mathematical Logic
by
learner_geek
Active
(
3.8k
points)

188
views
probability
engineeringmathematics
conditionalprobability
randomvariable
+1
vote
1
answer
29
Gateforum Test Series: Probability  Probability
asked
Jan 20
in
Probability
by
Prince Sindhiya
Loyal
(
6.3k
points)

52
views
gateforumtestseries
probability
0
votes
1
answer
30
probability
A player tosses two fair coins. He wins rs 2 if 2 heads occur and rs 1 if 1 head occurs. On the other hand, he loses rs 3 if no heads occur. if the player plays 100 times.then the amount he wins______________(RS).
asked
Jan 20
in
Mathematical Logic
by
learner_geek
Active
(
3.8k
points)

45
views
probability
engineeringmathematics
randomvariable
conditionalprobability
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