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Suppose that 100 customers of an online retailer were asked in an email survey whether they...

Suppose that 100 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. 65% said that they preferred free 3-day shipping. 40% of the customers were male. 75% of the males preferred free 3-day shipping.

Suppose a randomly selected customer prefers free 3-day shipping. What is the probability the customer is a female?

a.

67%
b.

31%
c.

54%
d.

35%
Math   Statistics-And-Probability   
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TOPIC:Events and probability.

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