MathDB
2020 BMT Team 18

Source:

January 9, 2022
combinatorics

Problem Statement

Let TT be the answer to question 1717, and let N=24TN =\frac{24}{T}. Leanne flips a fair coin NN times. Let XX be the number of times that within a series of three consecutive flips, there were exactly two heads or two tails. What is the expected value of XX?
Back to ProblemsView on AoPS