If one of $n$ coins is fair, then find the probability that the total number of heads is even
132134
If nine coins are tossed, what is the probability that the number of heads is even?
133848
Probability that 2 appears at an earlier position than any other even number in a permutation of 1-20
94807
Expected number of die rolls to get 6 given that all rolls are even.
34803
Evaluating even binomial coefficients
107688
A contest question on probability
74451
What is the probability of rolling $n$ dice until each side appears at least once?
139699
Probability of a Coin Toss
79546
Puzzle about technique of fair using of unfair coin
67328
Expected value of the number of flips until the first head
135696
Probability of an even number of sixes
124643
Probability that the sum of 6 dice rolls is even
96949
Discrete probability problem: what is the probability that you will win the game?
10018
Tossing a fair coin until two consecutive tosses are the same
117585
Calculating the expected number of unbalanced dice needed to reach a sum
12
Time taken to hit a pattern of heads and tails in a series of coin-tosses
99435
Proof of the inclusion-exclusion formula in probability
32422
What is the probability that there is at least one head and at least one tail?