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1. |
In what ratio must a grocer mix tea at $ 60 a kg, and $ 65 a kg, so that by selling the mixture at $ 68.20 a kg, he may gain 10%? |
A. | 3 : 2 |
B. | 3 : 4 |
C. | 3 : 5 |
D. | 4 : 5 |
Answer» B. 3 : 4 | |