TTGWD9-30

Q30:

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.

Answer:
                AD到底选啥？我都懵了，前面坐过选A,今天作答案又成了D

(25*a+15*c)/500=21

a+c=500