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12. | In what ratio must a grocer mix teas 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 | |