A coin is flipped 8 times. Find the probability of the event:exactly 5 heads

There are 8 choose 5 = 56 ways to get exactly 5 heads in 8 flips. Each sequence of 8 flips has probability 1/2⁸ = 1/256, so the probability is 56/256 = 0.21875, which rounds to 0.219, choice C.

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