400-1816-180
本題由lindy提供
The cost of each adult's ticket for a certain concert
(1) Hannah purchased twice as many children's tickets as adults' tickets.
(2) Hannah purchased 4 children's tickets.
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.
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答案：
A
一個(gè)音樂
問H這個(gè)人買的平均每張票多少錢？
條件1： 2Y=X， （ 30X+24Y）/（X+Y），用Y代表X，分子分母可約去Y，可以算出
條件2：Y=4，不知道，X無法算出，
選A
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