Question: If the probability is 0.1 that a person will make a mistake on his or her state income tax return, find the probability that (a)

If the probability is 0.1 that a person will make a mistake on his or her state income tax return, find the probability that
(a) Four totally unrelated persons each make a mistake;
(b) Mr. Jones and Ms. Clark both make a mistake, and Mr. Roberts and Ms. Williams do not make a mistake.

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