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July 31, 2015

Homework Help: Math/Prob

Posted by Ben on Wednesday, May 23, 2012 at 3:08pm.

Claire takes a five-question true-false test. She hasn't studied, so she guesses at random. With her ESP she figures she has a 60% probability of getting any one answer wrong.

A. What is the probability of getting an answer wrong? (Do you think they want me to ignore the ESP nugget or take it into account?)
b. Let P(x) be the probability of getting exactly x of the five answers right. Calculate p(0) through P(5)
c. What is the probability of getting at least three answers right.

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