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题库 / Prep2007E1-DS-22
Of the 800 sweaters at a certain store, 150 are red. How many of the red sweaters at the store are made of pure wool?
(1) 320 of the sweaters at the store are neither red nor made of pure wool.
(2) 100 of the red sweaters at the store are not made of pure wool.
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.
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画个韦恩图就可以知道了吧
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