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题库 / Prep2008E1-DS-12
Of the 25 cars sold at a certain dealership yesterday, some had automatic transmission and some had antilock brakes. How many of the cars had automatic transmission but not antilock brakes?
(1) All of the cars that had antilock brakes also had automatic transmission.
(2) 2 of the cars had neither automatic transmission nor antilock brakes.
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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25辆车，分为两种大情况，四种小情况
1）有ab的情况下：有at
2）有ab的情况下：无at
3）无ab的情况下：有at
4）无ab的情况下：无at
根据条件一，情况2不存在；根据条件二，情况4等于2，要求情况3，必须知道情况1。条件无法得知情况1，所以都不可以