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March 28, 2015

Homework Help: math

Posted by corey on Monday, May 23, 2011 at 7:41pm.

A multiple-choice test has 10 questions. Each question has 5 choices. If a student answers each question by guessing randomly, find the probability that the student gets:

a) at most 4 questions correct

b) at least 7 questions correct

Please show your work.

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