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Mathematics 21 Online
OpenStudy (anonymous):

65% of ND students are female. A random sample of 6 students is to be selected. Let the random variable X be the number of female students in a sample. a) explain why X is a binomial random variable b) what is the probability that out of 6 randomly selected students exactly 4 are female? c)what is the probability that of of 6 randomly selected students at most 2 are female? d) what is the probability that out of 6 randomly selected students at least 3 are male? e)find the average number of female students per sample if a large number of random samples of 20 students were selected

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