When shooting at a target in a two-dimensional plane,
Chapter , Problem 42(choose chapter or problem)
When shooting at a target in a two-dimensional plane, suppose that the horizontal miss distance is normally distributed with mean 0 and variance 4 and is independent of the vertical miss distance, which is also normally distributed with mean 0 and variance 4. Let D denote the distance between the point at which the shot lands and the target. Find E[D].
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