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1. Find the missing value indicated by (A) to make this a valid discrete probability distribution....

1. Find the missing value indicated by (A) to make this a valid discrete probability distribution.

x -10 30 50 90 100
P(X=x) 0.05 0.10 0.25 0.15 A

2. Calculate the mean of the random variable associated with the following discrete probability distribution. Do not round your answer.

x -1 0 1
P(X=x) 0.5 0.2 0.3
Math   Statistics-And-Probability   
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