题库搜索>问题求解PS-13314
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?”
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
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选U或者F或者两者都选的人数所占比率是56%+48%-30%=74%
所以neither U nor F（设为N）的比率是1-74%=26%
题目求B∩N，最大为26%，即26%*1200=312
TQ
选U或者F或者两者都选的人数所占比率是56%+48%-30%=74% 所以neither U nor F（设为N）的比率是1-74%=26% 因为求的是最大的possbile outcome, 而且 bargain的% > 26%, 就是说有可能在这都不选U&F的26%里面, 有可能都选了bargain. 故而B∩N = 26%，即26%*1200=312
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2020-12-24 05:24:59
FallonNGAI
感觉maximum possible number就是个干扰项
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2019-03-31 15:29:59
284815mrky回复FallonNGAI
应该不是干扰项，因为你不知道是否有人三个都用了，以及是否有人选了u选了B 选了F选了B 当然做的时候主要取极端情况
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2021-08-09 16:43:19
FallonNGAI
7和15和20都不会。
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2019-03-31 15:01:37
Mmmmm
56+48+42-30-100=16 42-16=26 26%*1200=312
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2018-08-12 12:55:33
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