A coin is flipped 10 times. Probability of exactly 5 heads?

A coin is flipped 10 times. Probability of exactly 5 heads?

Approach: Use binomial formula (n choose k) / 2^n.

63/256. (10 choose 5) = 252. 2^10 = 1024. 252/1024 = 63/256.

Follow-up: Estimate this as a percentage.

Key concepts: binomial distribution.