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12. If the average cost of 20 red balls and 58 blue balls is Rs. 900, and on the other hand, the averagecost of 38 red balls and 12 blue balls is Rs. 750, then the approximate average cost of 29 red ballsand 35 blue balls is given bya. Rs. 53860b. Rs. 53850C. Rs. 53840d. Rs. 53830 |
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