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题库 / Prep2007E1-DS-114
Henry purchased 3 items during a sale. He received a 20 percent discount off the regular price of the most expensive item and a 10 percent discount off the regular price of each of the other 2 items. Was the total amount of the 3 discounts greater than 15 percent of the sum of the regular prices of the 3 items?
(1) The regular price of the most expensive item was $50, and the regular price of the next most expensive item was $20.
(2) The regular price of the least expensive item was $15.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
B+C-A和0比大小。前提条件是A>B>C，所以条件（1）当然成立。
问0.2A+0.1B+0.1C>0.15（A+B+C)吗
（1）12+0.1C＞10.5+0.15C吗？
c<30吗？
肯定对啊，因为c是最便宜的，B都只有20了，C肯定＜20
所以（1）充分
有个纯粹由于自己手速太快，超过了自己脑子运转速度的错题
50>20+20
2.5起码大于1+1
条件1：没给出价格的最短的要达到30$才能占15%，因此不可能达到15%，所以仅凭条件一信息已经充分
搞错意思了，是问折扣的额度。
0.2A+0.1B+0.1C>0.15(A+B+C)?
条件1 A、B 都给了，C 有个条件是小于20的。所以充分。