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GWD15-24

Factor

Percent of Respondents

User-friendly

56%

Fast response time

48%

Bargain prices

42%

The table gives three factors to be considered when choosing an Internet service provider and the percent of the 1,200 respondents to a survey who cited that factor as important.  If 30 percent of the respondents cited both “user-friendly” and “fast response time,” what is the maximum possible number of respondents who cited “bargain prices,” but neither “user-friendly” nor “fast response time?”

A.     312

B.     336

C.     360

D.     384

E.      420

thanks

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many  thanks !!!!!!!!!!!!!

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agree upstair!!

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我是这样做的:“user-friendly” and “fast response time,” 一共占56%+48%-30%=74%。两者都没选的就是1-74%=26%。所以只选Bargain prices   的最多不能超过26%,那么就是1200*26%=312人。

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是选 A 吗?

0.56+0.48-0.3=0.74

(1-0.74)*1200=0.26*1200=312

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