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Two solutions have milk & water in the ratio 7:5 and 6:11.Find the proportion in which these two solutions should
Be mixed so that the resulting solution has 1 part milk and 2 parts water?

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If
1 1 0 2 2 1 1 ---> 0 0 1 0 0 2 2
1 0 1 1 0 0 1 ---> 2 1 2 2 1 1 2
then
2 2 1 1 0 1 1 ---> ???? Out of 32 books the cost of 10 books is Rs. 50 each and he got a profit of 4%. He sells 15 books at a profit of 3.8461% on the selling price of Rs 70. The remaining cost is 576. The remaining books are sold at Rs 74. What is his total profit.