Question: Assume that random guesses are made for seven multiple-choice questions on an SATtest so that there are n=7 trials, each with a probability of success(correct)

Assume that random guesses are made for seven multiple-choice questions on an SATtest so that there are n=7 trials, each with a probability of success(correct) given by p=0.5. 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)=?

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