The probability of all heads is (1/2)9 and the probability of all tails is also (1/2)9.
Therefore the probability of both heads and tails is 1 - 2(1/2)9 = 1 - (1/2)8 = 255/256.
Jaylen L.
asked • 02/05/19What is the probability that both heads and tails occur?
involving flipping a fair coin. Assume that the coin is flipped 9 times.
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