A fair coin is flipped 80 times. 1) What is the probability that the first Tail...

A fair coin is flipped 80 times.
1) What is the probability that the first Tail is obtained sometime after the 20th coin flip
(include no tails)?
2) Find an exact expression for the probability that more than 40 Heads are obtained.
3) Find an approximate value for the probability in (2) using an appropriate Gaussian
approximation.

Expert Solution

orchestra answered 2 years ago

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