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A person tosses a coin 21 times. In how many ways can he get 19 tails?

A person tosses a coin 21 times. In how many ways can he get 19 tails?

math   Statistics-And-Probability   
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Answer #1

Number of ways in which he can get 19 tails =

So, if a person tosses a coin 21 times, then he can get 19 tails in 210 ways.

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