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1. |
In what proportion may three kinds of tea prices at 80, 70 and 50 per kg be mixed to produce a mixture worth 60 per kg? |
A. | 2 : 2 : 3 |
B. | 2 : 1 : 3 |
C. | 1 : 2 : 3 |
D. | 1 : 1 : 3 |
Answer» E. | |