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 Choose the correct choice from the following answers:	A) 7/29	B) 7/25	C) 7/23	D) 7/22	E) 7/21
Ans: Here 2500 does not require.   From the diagram we know that only ones who invested in municipal bonds are 28%, the probability is 28 / 100   = 7/25   Answer:7/25
<result>B</result>
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