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During a department store sale 30 shoppers bought only clothing. 5 shoppers bought only towels, and 15 shoppers thought both clothing and towels. If 100 people shopped that day and a shopper is chosen at random, what is the probability that the shopper has bought towels?
10 years ago

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PsyDAG
(5 + 15)/100 = ?
10 years ago

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