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The MCQs below are drawn from the Mathematics subject category.
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7281
In a mixture, the ratio of milk and water is 3:2. If 4 liters of water is added to the mixture, the ratio of milk and water becomes 3:4. Find the initial quantity of milk.
Let initial milk and water be 3x and 2x. (3x) / (2x + 4) = 3 / 4. 12x = 6x + 12 => 6x = 12 => x = 2. Initial milk = 3x = 6 liters.
7282
The ratio of the total amount distributed in all males and females as salary is 6:5, while the ratio of the salary of each male and each female is 2:3. Find the ratio of the number of males and females.
Total salary = (Number of people) * (Salary of each). Number = Total Salary / Individual Salary. Ratio of males:females = (6/2) : (5/3) = 3 : 5/3 = 9 : 5.
7283
Rs. 33630 are divided among A, B, and C in such a manner that the ratio of the amount of A to that of B is 3:7 and the ratio of the amount of B to that of C is 6:5. The amount of money received by B is: