# Math

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What are the odds in favor of getting at least one head in three successive flips of a coin?

• Math -

"getting at least one head in 3 flips"
implies you don't want all 3 tails,
Pr(all 3 tails) = 1/8
Pr(at least one head) = 1 - 1/8 = 7/8

so odds in favour of at least one head
= 7:1

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