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为延考攒RP,现上传整理的GWD30套数学题的详细解答哈,黄色标注是正确答案。 10月31日 21:35 完善部分题的解答
本月jj396题是GWD数学部分(详见附件)原题:18-Q33: If Diana’s stamp collection, 4/5of the stamps are Canadian, and 3/7of the Canadian stamps were issued before 1940. If 192 stamps in Diana’s collection are Canadian stamps that were issued in 1940 or later, how many stamps in her collection are not Canadian?
A、84 B、88 C、96 D、104 E、112 解答: 因为3/7 是指1940以前,所以4/7才是1940 or later,等于192 stamps. 设邮票总数为X, X*4/5*4/7=192, X=420, not Canadian=> 总数的1/5, 故 答案= 420*1/5=84 |
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