Q4:
For a recent play performance, the ticket prices were $25 per adult and $15 per child. A total of 500 tickets were sold for the performance. How many of the tickets sold were for adults?
(1) Revenue from ticket sales for this performance totaled $10,500.
(2) The average (arithmetic mean) price per ticket sold was $21.
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.
真的是我太白痴了么？？搜遍CD也没有人问这道题。。。
答案为D，我选B
题目没有给任何有关Revenue 的信息，（1）怎么利用？￥10，500/500tickets？？
谢谢！！！！
你再仔细看看题，两个条件都能求得唯一解。
第一个是：25x+15(500-x)=10500
Q4:
For a recent play performance, the ticket prices were $25 per adult and $15 per child. A total of 500 tickets were sold for the performance. How many of the tickets sold were for adults?
(1) Revenue from ticket sales for this performance totaled $10,500.
(2) The average (arithmetic mean) price per ticket sold was $21.
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.
真的是我太白痴了么？？搜遍CD也没有人问这道题。。。
答案为D，我选B
题目没有给任何有关Revenue 的信息，（1）怎么利用？￥10，500/500tickets？？
谢谢！！！！
take it easy
条件(一)行的,
x+y=500
25x+15y=10500
估计LZ最近数学看太多了,套进去了
哦...我明白了...Revenue在这里是收入,不是税收啊....在这想怎么没有税率....谢谢了...
非常感谢
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