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| rev | Admin | (Created page with "'''Solution: A''' Let C be the number correct. C has a binomial distribution with n = 40 and p = 0.5. Then the mean is 40(0.5) = 20 and the variance is 40(0.5)(0.5) = 10. Wit...") | May 7'23 at 2:09 | +551 |