The Quant 754 / 75
EasyProbability
Flips Until First Head
OptiverIMC Trading
What is the expected number of flips of a fair coin until the first head appears?
Approach
This is a geometric distribution.
Sign in to reveal the full worked solution, check your answer instantly, and track your progress with spaced-repetition review.
Related problems
Two Dice Sum to 7EasyTop Two AcesMediumExpected Max of Two DiceMediumExpected Min of Two DiceMediumExpected Rolls for a SixEasyAt Least One SixEasy
More in Probability.