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1. |
Two types of tea costing $ 180 per kg and $ 280 per kg should be mixed in the ratio so that the mixture obtained, sold at $ 320 per kg to earn a profit of 20% is |
A. | 3 : 13 |
B. | 1 : 13 |
C. | 4 : 13 |
D. | 2 : 13 |
Answer» E. | |