扫描二维码，直接登录
题库 / Prep2007E1-DS-165
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.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
还没有题目讲解（毕出老师会陆续发布对官方考题的解读，请保持关注）。
忽略了1400总数这个条件
（1)36%M+50%F=42%×1400，且M+F=1400，所以可求出F
（2）只能得出considered engaging in research an essential goal的女士人数，不能得出参与调查的女士人数
题目问的是被调查的女性人数，2只能算出被调查女性中认为engaging in research an essential goal的人数
列个表，并且要读懂题意。第一个条件给的是男的里的36%和女的里的50% blabala，不是男的是和女的里的，要读懂题啊！！
题目问的是被调查的女性人数，2只能算出被调查女性中认为engaging in research an essential goal的人数
(1) In the survey 36% of men and 50% of women said that they consider engaging in research activity an essential goal:
m+w=1400m+w=1400 and 1400∗0.42=0.36∗m+0.5∗w1400∗0.42=0.36∗m+0.5∗w.
(2) In the survey 288 men said that they consider engaging in research activity an essential goal"
From this we can calculate only that 1400∗0.42−288=3001400∗0.42−288=300 women consider engaging in research activity an essential goal. No other info. Not sufficient.
②只能算出considered engaging in research an essential goal的女人，而无法算出女人总数
36%M+50%W=1500*42%
64%M+50%W=1500*58%
设一共有x女人，则一共有1400-x男人，由（1）可得：36%*（1400-x）+50%x=42%*1400。条件2没有给出男女比例无法算出
36%M+50%W=1500*42%
64%M+50%W=1500*58%
理解错意思了：Of the 1,400 college teachers surveyed 有多少女人参加survey，而不是想engaging in research an essential goal.
M+W=1400
(1) 36%M+42W=1400*42%
1. 36%(1400-W) +50%W=1400*42% 充分
(1)
36%M+50%W=1500*42%
64%M+50%W=1500*58%