Re: [計量] GWD 01-37

看板GMAT (GMAT入學考試)作者 (龐克新生報到^_^)時間16年前 (2008/10/09 10:02), 編輯推噓0(000)
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※ 引述《chengyuyang ()》之銘言: : ※ 引述《a1985526 (new)》之銘言: : : Q: Of the 500 business people surveyed, 78 percent said that they use their : : laptop computer in hotels, and 52 percent said that they use them both at home : : and in hotels. How many of the business people surveyed said that they do not : : use their laptop computers either at home or in the hotels? : : A. 45 B. 55 C. 65 D.95 E. 130 : : Ans: A : : 要怎麼求出the percentage of people use laptop at home? : : 或者不需要知道也算得出答案嗎? : : 謝謝! : Of the 500 business people surveyed, 78 percent said that they use their : laptop computers at home, 65 percent said that they use them in hotels,and : 52 percent said that they use them both at home and in hotels. : How many of the business people surveyed said that they do not use their : laptop computers either at home or in hotels? : .78*500=390at home : .65*500=325in hotels : .52*500=260 both : 500-390-325+260=45 : 你少了一大句了 Home+hotel=78+65-52=91% 1-91=9% 沒用laptop 500*9%=5*9=45人,選(A) -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 210.244.13.26
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