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7 September, 03:55

If you toss 9 fair coins, in how many ways can you obtain at least one tail ?

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  1. 7 September, 05:39
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    9/18 or 50% if you toss the coin because when you toss 1 coin you get a 1/2 chance of getting tails. Do that nine times and you get 9/18
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