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试卷名称:GRE（QUANTITATIVE）综合模拟试卷17

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A group of 5,000 investors responded to a survey asking whether they owned stocks and whether they owned bonds. Of the group, 20 percent responded that they owned only one of the two types of investments. If r is the number of investors in the group who owned stocks but not bonds, which of the following represents the number of investors in the group who owned bonds but not stocks, in terms of r ?

A．5,000 - r

B．1,000-r

C．r- 1,000

D．l,000r

E．(0.2)(5,000 - r)

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