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Suppose that 100 former customers of an online retailer were asked in an email survey whether they preferred free 3-day shipping or whether they preferred
Suppose that 100 former customers of an online retailer were asked in an email survey whether they preferred free 3-day shipping or whether they preferred overnight shipping for $4.99. 75% said that they preferred free 3-day shipping. 70% of the customers were male. 80% of the males preferred free 3-day shipping.
Suppose a randomly selected customer prefers overnight shipping. What is the probability the customer is a male?
A. 25
B. 31
C. 19
D. 56
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