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The weekly demand of aslow-moving product has the probability mass function shown to the right. Find the expectedvalue, variance, and standard deviation of weekly demand.

The weekly demand of aslow-moving product has the probability mass function shown to the right.

Find the expectedvalue, variance, and standard deviation of weekly demand.

Demand, x Probability, f(x)

0 0.2

1 0.3

2 0.1

3 0.4

4 or more 0.0

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