Mathematics, 10.03.2020 05:34 mooncake9090
Assume that random guesses are made for eight multiple choice questions on an SAT test, so that there are nequals8 trials, each with probability of success (correct) given by pequals0.65. Find the indicated probability for the number of correct answers. Find the probability that the number x of correct answers is fewer than 4.
Answers: 3
and P(X < 4) = 0.1061
trials, each with probability of success given by 
. Let X be the random variable that represents the number of correct answers gotten by random guesses, then, X has a binomial distribution, and so, 
, this is the probability that the number x of correct answers is fewer than 4.
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