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A,b,c,d It is known that 5% of students on a particular campus are on drugs. If 12 students are selected at random from this campus,

A,b,c,d

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It is known that 5% of students on a particular campus are on drugs. If 12 students are selected at random from this campus, a) What is the probability that 3 of them are on drugs? b) What is the probability that at least 3 of them are on drugs? c) What is the probability that between 3 and 6 of them are on drugs? d) Calculate the mean and standard deviation for this random variable

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