Recent questions tagged expectation

5 votes
3 answers
61
An unbiased coin is tossed repeatedly and outcomes are recorded. What is the expected no of toss to get HT ( one head and one tail consecutively) ?
1 votes
3 answers
62
9 votes
2 answers
63
Suppose we use a hash function h to hash n distinct keys into an array T of length m. Assuming simple uniform hashing, what is the expected number of collisions?
2 votes
1 answer
66
Q If probability of frame reaching safely is 0.1 then mean number of transmissions of a frame to make it success is _____.How to solve this question?
7 votes
3 answers
67
A fair die is tossed two times. the probability that 2nd toss results in value greater than first toss is ?
1 votes
2 answers
68
Out of 2000 families with 4 children each how many families would you expect to have atleast one BOY..?
2 votes
5 answers
69
A fair coin is tossed repeatedly till both head and tail appear atleast once. Average no of tosses required is ?
19 votes
4 answers
74
Assume that you are flipping a fair coin, i.e. probability of heads or tails is equal. Then the expected number of coin flips required to obtain two consecutive heads for...
3 votes
4 answers
75
X is uniformly distributed random variable that takes values between 0 and 1.The value of E(X^3) will be
2 votes
1 answer
76
What is expected value of the sum of the numbers appearing on two fair dice when they are rolled given that the sum of these numbers is at least nine. That is, what is E(...
2 votes
1 answer
78
Answer is 50,700,551/10,077,696 ≈ 5.03Do we need to take all X(R.V.): 1,2,3,4,5,6,7,8,9,10 cases or else
72 votes
8 answers
79
An unbiased coin is tossed repeatedly until the outcome of two successive tosses is the same. Assuming that the trials are independent, the expected number of tosses is$3...
61 votes
3 answers
83
Suppose you break a stick of unit length at a point chosen uniformly at random. Then the expected length of the shorter stick is ________ .
61 votes
6 answers
84
Consider an undirected random graph of eight vertices. The probability that there is an edge between a pair of vertices is $\dfrac{1}{2}.$ What is the expected number of ...