Question 54

The average expenditure of a man for the first five months is Rs. 1200 and for the next seven months is Rs. 1300. Find his monthly average income if he saves Rs. 2900 during the year ?

Solution

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Let his monthly salary be x rupees.

So, 5 (x - 1200) + 7 (x-1300) = 2900

12x - 6000 - 9100 = 2900

So, x = 18000/12 = 1500

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