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For a group of four 40-year old men, the probability distribution for the number a who live through the next year is as given in

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For a group of four 40-year old men, the probability distribution for the number a who live through the next year is as given in the table below. 8 P(x) O 0.0+ F 0.0+ 0.0010 N m 0.0500 0.9490 Verify that the table is indeed a probability distribution. Then find the mean of the distribution

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