Question 400430
Suppose there are 35 students in a class and 30 lectures in 1 semester. If 4 students are randomly picked in a class to answer questions, what is the probability that one student is never called during the semester? 
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Binomial Problem with n = 4*30 = 120 and p(not called) = 34/35
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P(x = 0) = (34/35)^120 = 0.031
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Cheers,
Stan H.