A coin is flipped 8 times. Find the probability of the event:exactly 3 heads

For exactly 3 heads in 8 flips, choose which 3 of the 8 flips are heads: there are ⁸C₃ = 56 such outcomes. There are 2⁸ = 256 equally likely outcomes altogether, so the probability is 56/256 = 0.21875, which rounds to 0.219. The correct choice is 0.219.

AI-written and checked against the verified answer.