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The headline of a news article posted on cbsnews.com read, A 'coin flip': Nearly half of U.S. murders go unsolved as cases rise. Suppose

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The headline of a news article posted on cbsnews.com read, "A 'coin flip': Nearly half of U.S. murders go unsolved as cases rise." Suppose that the probability a murder is successfully solved is exactly p = 0.5. (a) Find the mean and standard deviation in a city with 215 murders. = and = (b) Estimate the probability that fewer than 40% of murders in a city with 215 murders are solved. P(X < 40%) = Submit

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