If the probability is 0.1 that a person will make a mistake onhis or her state i

Question

If the probability is 0.1 that a person will make a mistake onhis 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. If the probability is 0.1 that a person will make a mistake onhis 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.

Explanation / Answer

the probability that a person will make a mistake on his orher state income tax return = 0.1 the probability that a person will not make a mistake on hisor her state income tax return = 0.9 a) four totally unrelated persons each make a mistake = 0.1 x0.1 x 0.1 x 0.1 = 0.0001 b) Mr. Jones and Ms. clark both make a mistake, and Mr.Roberts and Ms. Williams do not make a mistake. b) Mr. Jones and Ms. clark both make a mistake, and Mr.Roberts and Ms. Williams do not make a mistake. = 0.1 x 0.1 x 0.9 x 0.9 = 0.0081

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