单选题
The ratio of 2 quantifies is 5 to 6. If each of the quantities is increased by 15, what is the ratio of these two new quantifies? A. 5:6 B. 25:27 C. 15:16 D. 20:21 E. It cannot be determined from the information given.
【正确答案】
E
【答案解析】With no idea of what the quantifies actually are, there is no way to tell how adding 15 to each of them will affect their ratio; for example, if the quantities were 5 and 6, the new ratio would be 20:21, but if the quantities were 10 and 12, the ratio would be 25:27.