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| rev | Admin | (Created page with "'''Solution: B''' Let N denote the number of accidents, which is binomial with parameters 3 and 0.25 and thus has mean 3(0.25) = 0.75 and variance 3(0.25)(0.75) = 0.5625. Le...") | May 7'23 at 23:22 | +1,271 |