problem involving the probability of a union Pa In Bill the Boring's dryer there are 9 black shirts, 8 gray shirts, 10 black sweaters, and 10 gray sweaters. Bill is going to take one of these pieces of clothing out of the dryer at random to check if his clothes are completely dry. What is the probability that the plece of clothing Bill takes out is black or is a sweater? Do not round intermedilate computations, and round your answer to the nearest hundredth. (If necessary, consult a list of formulas.)

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