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20 July, 23:20

You toss a fair coin repeatedly until you get 4 consecutive heads. what is the expected number of coin tosses?

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  1. 21 July, 02:57
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    Chance of getting 4 heads in a row is (1/2) ^4=1/16. So it should take 16 tries to likely get 4 heads in a row. Now to find amount of coin tosses it would be 16 x 4 = 64 coin tosses.
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