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Assume that random guesses are made for nine multiple choice questions on an SAT​ test, so...

Assume that random guesses are made for nine multiple choice questions on an SAT​ test, so that there are n=9 ​trials, each with probability of success​ (correct) given by p=0.3 . Find the indicated probability for the number of correct answers. Find the probability that the number x of correct answers is fewer than 4 . P( X<4)= (Round to four decimal places as​ needed.)

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Answer #1

This is a Binomial distribution.We have to find P(X<4) which means P(X≤3).

P(X<4)= P(X≤3)= 0.7297

(PLEASE UPVOTE)

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