The monthly pocket money of Ravi and Sanjeev are in the ratio 5: 7.

(i) The monthly pocket money of Ravi and Sanjeev are in the ratio 5: 7. Their expenditures are in the ratio 3: 5. If each saves Rs 80 every month, find their monthly pocket money.
(ii) In class X of a school, the ratio of the number of boys to that of girls is 4 : 3. If there were 20 more boys and 12 fewer girls, then the ratio would have been 2: 1, How many students were there in the class?

Solution:

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