推 freemind99:謝謝幫解答^^ 看來PP詳解上的算法有時候也不完全對 12/03 21:45
※ 引述《freemind99 (freemind99)》之銘言：
: 165. 16466-!-item-!-187;#058&010795
: Of the 1,400 college teachers surveyed, 42 percent said that they considered
: engaging in research an essential goal. How many of the college teachers
: surveyed were women?
: (1) In the survey, 36 percent of the men and 50 percent of the women said
: that they considered engaging in research an essential goal.
: (2) In the survey, 288 men said that they considered engaging in research an
: essential goal.
: Ans: A
: 我看pp詳解上 是用1400x42%x50%算出答案
: 可是我有個疑問
: 如果是用42%裡面的人去算女性的人數
: 那扣除36%(男性) 50%(女性) 以外剩下的14%是屬於哪種人比例????
: 感覺上好像怪怪的....
(1)36%的男生saidthat they considered engaging in research an essential goal
50%的女生saidthat they considered engaging in research an essential goal
設男生人數X人 女生人數為(1400-X)人
1400x0.42=588
0.36X + 0.5(1400-X) = 588
X=800
1400-800=600 女生人數為600人
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