Questions Ratio and Proportion

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                    Attempt all these problems

1. A school has 630 students. The ratio of the number of boys to the number of girls is 3 : 2. This ratio changes to 7 : 5 after the admission of 90 new students. Find the number of newly admitted boys.

2. What quantity must be subtracted from each term of the ratio 9: 17 to make it equal to 1: 3?

3. The monthly pocket money of Fateemah and Fawaz are in the ratio 5 : 7. Their expenditures are in the ratio 3 : 5. If each saves #800 every month, find their monthly pocket money.

4. In a basket, the ratio between the number of oranges and the number of apples is 7: 13. If 8 oranges and 11 apples are eaten, the ratio between the number of oranges and the number of apples becomes 1: 2. Find the original number of oranges and the original number of apples in the basket.

5. In a mixture of 126 kg of milk and water, milk and water are in ratio 5 : 2. How much water must be added to the mixture to make this ratio 3 : 2?

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