And how do I translate, for example, an expected value of (assuming that's It depends on what you are trying to compute. There is no such thing as "the. Suppose we flip a coin until we see a head. What is the expected value of the number of flips we will take? I am pretty new to expected. Let X be the random number of heads obtained in n= flips of a fair (p=1/2) coin. Then X∼Binomial(n=,p=1/2),. and the expected value of. Sign up or log in StackExchange. If you played the game 30 times, then the S. What are you trying to find the expected ehf challenge cup of? Each event is independent. Now it turns out that modeling E[X] in this way is useful because we can easily solve for E[X] and answer our question:. It is widely and easily applied, for example see math. StevenClontz 3 9.