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题库 / GMATAdvanced-DS-2
Bowls X and Y each contained exactly 2 jelly beans,each of which was either red or black.One of the jelly beans in Bowl X was exchanged with one of the jelly beans in Bowl Y.After the exchange,were both of the jelly beans in Bowl X black?
(1)Before the exchange,Bowl X contained 2 black jelly beans.
(2)After the exchange,Bowl Y contained 1 jelly bean of each color.
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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切记两个条件分开考虑，条件1不要代入2，并且按顺序做
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