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    Complete probability and find the mean and standard dev.
    x=250 P(x) = .40
    x= 100 P(x) = .10
    x= 250 P(x) = .20

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    Solution Preview

    Solution. Denote the mean and standard deviation by a and b, respectively. Then we can complete the probability table as follows.

    x=250 P(x) = .40 ...

    Solution Summary

    The expert completes the probability and find the mean and standard deviation.