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how to get this answer? thanks Unanswered Question 12 0 / 1 pts The manager of a stockroom in a factory has constructed the following

how to get this answer? thanks

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Unanswered Question 12 0 / 1 pts 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. X O 2 P(X = x) 0.1 0.5 0.4 It costs the factory $10 each time the tool is used. Find the variance of the daily cost for use of the tool. Give your answer as an integer. You Answered Correct Answers 41 (with margin: 0)

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