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Traditionally students in probability and random variables cource at university are successfull with probability p =...

Traditionally students in probability and random variables cource at university are successfull with probability p = 0.81.
suppose 15 students are selected at random from all the previous students in this cource.
Find the probability that more then 12 of them will have been successful in the course?

Math   Statistics-And-Probability   
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