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given the discrete probability distribution below: x 10 20 30 40 50 P(x) 0.3 0.05 0.1...

given the discrete probability distribution below:

x 10 20 30 40 50
P(x) 0.3 0.05 0.1 0.05 0.2

calculate:

a. E(x)

b. Var(x)

c. σx

Math   Statistics-And-Probability   
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