Question: The weekly demand (in thousands) for a plumber in a city is listed below along with corresponding probabilities. Demand (X) P(X) 1 0.2 2 0.1

The weekly demand (in thousands) for a plumber in a city is listed below along with corresponding probabilities.

Demand (X) P(X)
1 0.2
2 0.1
3 0.4
4 0.3

Show workings for each of your answers.

Find the expected demand and interpret.

Find the standard deviation of demand.

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