Assume it is known that the probability of birth is equal in all months. What is the probability

that in the STAT class of 120 students, exactly 20 students have their birthdays in either August or September? Solve using (i) the exact Binomial distribution, (ii) the Normal approximation to the Binomial distribution.

2 answers

If "the probability of birth is equal in all months," that means that you would expect 10 students to be born in each month. Would either distribution apply in this case?
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