Some question: In a certain animal population, for each of the first 3 months of life, the probability that an animal will die during that month is 1/10. For a group of 200 newborn members of the population, approximately how many would be expected to survive the first 3 months of life?\nOptions:\n(A) 140\n(B) 146\n(C) 152\n(D) 162\n(E) 170
Some stream of consciousness:
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Number of newborns that can die in first month = 1/10 * 200 = 20\nSurvived = 180\nNumber of newborns that can die in second month = 1/10 * 180 = 18\nSurvived = 162\nNumber of newborns that can die in third month = 1/10 * 162 = 16\nSurvived = 146 The answer: (B).
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