# algebra/check my answer

Three fair coins are tossed. What is the probability that at least one is a head? (Enter the probability as a fraction.) I came up with 7/8

Thank you

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1. find probability that NONE are heads

(1/2)^3 = 1/8
so we want
1 - 1/8 = 7/8 agree with you

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posted by Damon

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