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A construction company has to complete a project no later than 4 months. The manager believes...

A construction company has to complete a project no later than 4 months. The manager believes there are three possible values for the random variable X, the number of months to complete the project, which are 3,4, or 5 months. The probabilities of the 3 possible values are in the ratio of 1 to 3 to 1. You create the probability distribution first, then compute the standard deviation (in month). Answer needed in excel form

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131 kott k k and k 0.2, 0.6, o 2

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