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(See Steps) The number of days in a working week, N, for which a lift has a problem has the following distribution. x 0 1 2 3 4 5 Pr(X=x) 0.28 0.5 0.12

Question: The number of days in a working week, N, for which a lift has a problem has the following distribution.

x 0 1 2 3 4 5
Pr(X=x) 0.28 0.5 0.12 0.05 0.04 0.01

Find the expected number of days per working week for which the lift has a problem. (1.5 marks)

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Solution: The downloadable solution consists of 1 pages
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