SOLUTION: in a class of 20 students, 4 of them did not pass the middle exam. if we randomly select 2 students, what is the probability that both students pass the middle exam
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Question 1022353: in a class of 20 students, 4 of them did not pass the middle exam. if we randomly select 2 students, what is the probability that both students pass the middle exam Answer by robertb(5830) (Show Source):
