The manager of a stockroom in a factory has constructed the


The manager of a stockroom in a factory has constructed the following probability distribution for the daily demand (number of times used) for a particular tool.

y 0 1 2
p(y) 0.1 0.5 0.4

It costs the factory $10 each time the tool is used. Find the mean and variance of the daily cost for use of the tool.

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Microeconomics: The manager of a stockroom in a factory has constructed the
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