Find the probability that the student gets exactly 15 correct answers.

Mathematics
Tutor: None Selected Time limit: 1 Day

A student answers all 48 questions on a multiple choice test by guessing. Each question has four possible answers, only one of which is correct. Find the probability that the student gets exactly 15 correct answers. Use the normal distribution to approximate the binomial distribution. 

May 1st, 2015

Binomial distribution P(x)  = 0.07............................................................................................................

Just put the formula

take x = 0.25 as 1 out of 4 will be correct.

May 1st, 2015

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May 1st, 2015
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May 1st, 2015
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