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There are 8 permutations of flipping a coin 3 times, or of flipping 3 coins one time. They are, with the permutations of two heads bolded...

TTT

TTH

THT

THH

HTT

HTH

HHT

HHH

... thus, the probability of flipping a coin 3 times and getting 2 heads is 3 in 8, or 0.375.

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13y ago

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