Re: [計量] PP DS1 64

[moll (堅持)]

※ 引述《piapiapia (piapiapia)》之銘言：
: 64.     5320-!-item-!-187;#058&004563
: Are at least 10 percent of the people in Country X who are 65 years old or
: older employed?
: (1) In Country X, 11.3 percent of the population is 65 years old or older.
: (2) In Country X, of the population 65 years old or older, 20 percent
:     of the men and 10 percent of the women are employed.
: 答案是B
: A我能夠排除，想請問B應如何思考?
: 謝謝!



設M為65歲以上男性    W為65歲以上女性

(2)   0.2M + 0.1W    思考： 會不會大於   (M+W)0.1

     整理一下 0.1(2M+W)        得到  2M+W  一定大於 M+W

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