Q24:
A certain fruit stand sold apples for $0.70 each and bananas for $0.50 each. If a customer
purchased both apples and bananas from the stand for a total of $6.30, what total number
of apples and bananas did the customer purchase?
A. 10
B. 11
C. 12
D. 13
E. 14
已经晕了，不是买9个苹果就6.3块了么？7只有乘以9后个位才会是3，苹果和香蕉一起买怎么也买不出6.3块啊？ | 
