Here is the problem that I'm working on, please post any ideas on how to solve this:
A survey was made of 100 customers in a department store. Sixty of the 100 indicated they visited the store because of a newspaper advertisement. The remainder had not seen the ad. A total of 40 customers made purchases; of these customers, 30 had seen the ad. What is the probability that a person who did not see the ad made a purchase? What is the probability that a person who saw the ad made a purchase?
Andy help will be appreciated.
2006-10-26
11:27:59
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4 answers
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asked by
andy
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Mathematics