GWD (1)

laishiangchun · 发表于 2010-9-16 11:58:17

Q30: (答案是D, 但是我覺得A可以呢, 因為郵票數量一定是整數, 所以可以算出各買10張就是那些錢, 不知道這樣想哪裡錯了? 請高手幫忙解答)
Joanna bought only $0.15 stamps and $0.29 stamps. How many $0.15 stamps did she buy?
(1)    She bought $4.40 worth of stamps.
(2)    She bought an equal number of $0.15 stamps and $0.29 stamps.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
Answer: D

laishiangchun · 发表于 2010-9-17 01:59:16

這題太簡單了, 所以都沒人理我:-p
我看錯答案了啦, 我以為是C所以搞不懂, 現在我知道了:-)

arthur7997 · 发表于 2010-9-17 02:06:05

条件1的确能解出来，答案不可能是D吧，条件2没法算出多少邮票来，应该是A

laishiangchun · 发表于 2010-9-17 02:49:12

對呢, B不行, 我剛又把$4.4算進去了(1選項), 我也覺得答案應該是A, 但是答案是D呢..........奇怪????

daisylife · 发表于 2010-9-17 10:07:41

A行吗？如果把4.4全买0.15或0.29能推出，但是题目说他两样全买了，那答案是不是不唯一了？

jassonw · 发表于 2010-9-17 10:28:45

应该都能解出来，注意stamp是整数，带进去算算就知道了

laishiangchun · 发表于 2010-9-17 23:41:56

應該確定答案錯了(跟一個高手同學請教過了), 答案是A

GWD (1)

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