Question

Asked Nov 5, 2019

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Assume that random guesses are made for seven multiple choice questions on an SAT test, so that there are n=7 trials, each with probability of success (correct) given by p=0.25

Find the probability that the number x of correct answers is fewer than

Find the probability that the number x of correct answers is fewer than

4.

Step 1

It is given that *X ~B(7,0.25)*.

The PMF of binomial distribution is given by,

Step 2

The probability that the number X of c...

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