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19. | In what ratio must a grocer mix two varieties of tea worth Rs. 60 a kg and Rs. 65 a kg so that by selling the mixture at Rs. 68.20 a kg he may gain 10%? | |
A. | 3:02 | |
B. | 3:04 | |
C. | 3:05 | |
D. | 4:05 | |