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An inventory of appliances contains four white washers and one black washer. If a customer selects one at random, what is the probability that the

An inventory of appliances contains four white washers and one black washer. If a customer selects one at random, what is the probability that the black washer will be selected?

a. 0.5

b. 0.4

c. 0.2

d. 0.8

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