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题库 / Prep2007E1-DS-179
A manufacturer conducted a survey to determine how many people buy products P and Q. What fraction of the people surveyed said that they buy neither product P nor product Q ?
(1) ~$\frac{1}{3}$~ of the people surveyed said that they buy product P but not product Q.
(2) ~$\frac{1}{2}$~ of the people surveyed said that they buy product Q.
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）。
P 和 Q 不是独立事件 还有 既 P 又 Q 啊~
然而反过头来仔细看题，2）说了买 Q 但没说只买 Q，所以是不是应该理解成包含那部分既买 Q 又买 P 的？
对。
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