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Among a group of 2500 people, 35 percent invest in municipal bonds, 18 percent invest in oil stocks, and 7 percent invest in both municipal bonds and oil stocks. If 1 person is to be randomly selected from 2500 people, what is the probability that the person selected will be one who invests in municipal bonds but not in oil stocks?

A7/25

B6/25

C1/25

DNone of these

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Answer: 7/25 is the probability.

Solution: 35% invests in municipal bonds.

It also includes 7% who invested in both municipal bonds and oil stocks.

So, 35-7 = 28% invests in municipal bonds but not in oil stocks

Therefore, probability = 28/100 = 7/25

7/25 is the probability of person only invest in municipal bonds.