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Question

Monthly average expenditure of a family with $$4$$ members is $$Rs\ 2,800$$. Find the monthly average expenditure of a family with only $$3$$ members.


Solution

Monthly expenditure of a family with $$4$$ members $$= Rs.2800$$
Monthly expenditure of a family with $$1$$ member $$= \cfrac{2800}{4} = Rs. 700$$
Therefore,
Monthly expenditure of a family with $$3$$ members $$= 700 \times 3 = Rs. 2100$$

Maths

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