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Recent questions tagged expectation
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Made Easy Mock -1
how to approach this question?
TusharKumar
asked
in
Probability
Dec 30, 2022
by
TusharKumar
277
views
numerical-answers
made-easy-test-series
probability
expectation
1
vote
1
answer
2
Probability Doubt
The expected number of times a 6 appears when a fair die is rolled 10 times is equal to?
Manisha Jaishwal
asked
in
Probability
Dec 10, 2022
by
Manisha Jaishwal
214
views
probability
expectation
0
votes
2
answers
3
TIFR CSE 2022 | Part A | Question: 2
We would like to invite a minimum number $n$ of people (their birthdays are independent of each other) to a party such that the expected number of pairs of people that share the same birthday is at least $1.$ What should $n$ be? (Ignore leap years, so ... birthdays fall with equal probability on each of the $365$ days of the year.) $23$ $28$ $92$ $183$ $366$
Lakshman Patel RJIT
asked
in
Probability
Sep 1, 2022
by
Lakshman Patel RJIT
303
views
tifr2022
probability
expectation
2
votes
1
answer
4
Applied Test Series
A final exam is a discrete mathematics course consisting of 20 true-false questions, each worth 3 points and 10 multiple choice questions, each worth 4 points. Suppose that the probability that a student gives a correct answer to a true-false question is ... student gives a correct answer to a multiple choice question is 0.8. What is student expected score on the final exam___
LRU
asked
in
Probability
Nov 7, 2021
by
LRU
382
views
test-series
engineering-mathematics
probability
expectation
2
votes
1
answer
5
TIFR CSE 2021 | Part B | Question: 11
Suppose we toss a fair coin (i.e., both beads and tails have equal probability of appearing) repeatedly until the first time by which at least $\textit{two}$ heads and at least $\textit{two}$ tails have appeared in the sequence of tosses made. What is the expected number of coin tosses that we would have to make? $8$ $4$ $5.5$ $7.5$ $4.5$
soujanyareddy13
asked
in
Probability
Mar 25, 2021
by
soujanyareddy13
780
views
tifr2021
probability
expectation
4
votes
1
answer
6
GATE Electrical 2021 | GA Question: 8
Let $X$ be a continuous random variable denoting the temperature measured. The range of temperature is $[0, 100]$ degree Celsius and let the probability density function of $X$ be $f\left ( x \right )=0.01$ for $0\leq X\leq 100$. The mean of $X$ is __________ $2.5$ $5.0$ $25.0$ $50.0$
Arjun
asked
in
Quantitative Aptitude
Feb 20, 2021
by
Arjun
1.4k
views
gateee-2021
quantitative-aptitude
probability
probability-density-function
expectation
16
votes
4
answers
7
GATE CSE 2021 Set 2 | Question: 29
In an examination, a student can choose the order in which two questions ($\textsf{QuesA}$ and $\textsf{QuesB}$) must be attempted. If the first question is answered wrong, the student gets zero marks. If the first question is answered correctly and the ... $22$. First $\textsf{QuesA}$ and then $\textsf{QuesB}$. Expected marks $16$.
Arjun
asked
in
Probability
Feb 18, 2021
by
Arjun
4.3k
views
gatecse-2021-set2
probability
expectation
2-marks
6
votes
2
answers
8
TIFR CSE 2020 | Part A | Question: 1
Two balls are drawn uniformly at random without replacement from a set of five balls numbered $1,2,3,4,5.$ What is the expected value of the larger number on the balls drawn? $2.5$ $3$ $3.5$ $4$ None of the above
Lakshman Patel RJIT
asked
in
Probability
Feb 10, 2020
by
Lakshman Patel RJIT
1.9k
views
tifr2020
engineering-mathematics
probability
expectation
2
votes
1
answer
9
ISI2015-MMA-53
The number of cars $(X)$ arriving at a service station per day follows a Poisson distribution with mean $4$. The service station can provide service to a maximum of $4$ cars per day. Then the expected number of cars that do not get service per day equals $4$ $0$ $\Sigma_{i=0}^{\infty} i P(X=i+4)$ $\Sigma_{i=4}^{\infty} i P(X=i-4)$
Arjun
asked
in
Probability
Sep 23, 2019
by
Arjun
893
views
isi2015-mma
poisson-distribution
expectation
1
vote
1
answer
10
Cormen Edition 3 Exercise 8.4 Question 3 (Page No. 204)
Let $X$ be a random variable that is equal to the number of heads in two flips of a fair coin. What is $E[X^2]$? What is $E^2[X]$?
akash.dinkar12
asked
in
Algorithms
Jun 28, 2019
by
akash.dinkar12
335
views
cormen
algorithms
sorting
bucket-sort
expectation
descriptive
0
votes
1
answer
11
Ace Test Series: Probability - Uniform Distribution
Na462
asked
in
Probability
Feb 2, 2019
by
Na462
683
views
random-variable
probability
expectation
uniform-distribution
ace-test-series
2
votes
1
answer
12
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 _______.
cocgame
asked
in
Probability
Jan 5, 2019
by
cocgame
3.1k
views
probability
usergate2015
usermod
expectation
1
vote
0
answers
13
Random Variable
Let X and Y are two random variables with E(X)=10,E(Y)=20 and Var(X)=25,Var(Y)=36 and E(X.Y)=225. Now consider Z=aX-bY+1. Find a and b when E(Z)=1 and Var(Z)=1.
Shubhgupta
asked
in
Probability
Jan 3, 2019
by
Shubhgupta
642
views
engineering-mathematics
variance
expectation
2
votes
2
answers
14
made easy test series - 30 cards are drawn at a time out of 80 playing cards numbered from 1 to 80
How to do this question ..please help me guys
rekhameena
asked
in
Probability
Nov 22, 2018
by
rekhameena
638
views
expectation
2
votes
2
answers
15
ISI2016-MMA-9
Suppose $X$ and $Y$ are two independent random variables both following Poisson distribution with parameter $\lambda$. What is the value of $E(X-Y)^2$ ? $\lambda$ $2 \lambda$ $\lambda^2$ $4 \lambda^2$
go_editor
asked
in
Probability
Sep 13, 2018
by
go_editor
652
views
isi2016-mmamma
probability
random-variable
poisson-distribution
expectation
0
votes
1
answer
16
me test
A simple graph with n vertices is constructed by randomly and independently placing an edge between every two vertices with probability p. What is the expected no. of nodes with degree 2?
ronin_codex
asked
in
Graph Theory
Jul 17, 2018
by
ronin_codex
355
views
probability
graph-theory
expectation
simple-graph
1
vote
1
answer
17
GATE Suitability Test | Test 1 | Question: 3
A coin is such that after every toss the probability of same side coming again increases by $50\%$ from the initial value. If initially the probability of head and tail are the same, what is the expected number of tosses until we get a head?
Arjun
asked
in
Probability
Jun 10, 2018
by
Arjun
140
views
gate-suitability-test-1
expectation
probability
numerical-answers
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