MathDB
Putnam 2002 B1

Source:

March 12, 2012
Putnamprobabilityinductionconditional probabilitycollege contests

Problem Statement

Shanille O'Keal shoots free throws on a basketball court. She hits the first and misses the second, and thereafter the probability that she hits the next shot is equal to the proportion of shots she has hit so far. What is the probability she hits exactly 5050 of her first 100100 shots?