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A poll of 20 dudes is taken on a large city. The purpose is to determine whether they consider girl showed on a photo attractive.

A poll of 20 dudes is taken on a large city. The purpose is to determine whether they consider girl showed on a photo attractive. It is known that approximately 80% of the dude population agrees.

a) What is the probability that (exactly) 7 dudes agree? b) What is the probability that all of 20 agree? c) What is the probability that at least three dudes disagree?

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