Question
Ratio of monthly savings to monthly income of Prashant is
7:25. His four months savings is Rs. 26,600. Out of his monthly expenditure, he spends 20% on food, 25% of remaining on travelling, 40% of the now remaining income on entertainment, 75% of now remaining income on education and spends rest on others. Find his five months expenditure on others.Solution
Let the monthly savings and monthly income of Prashant be Rs. 7b and Rs 25b respectively.
ATQ:
4 X 7b = 26,600
Or, 28b = 26,600
Or, 'b' = 950
Monthly expenditure = 25b - 7b = 18b = 18 X 950 = Rs. 17,100
Monthly expenditure on others = 17,100 X 0.8 X 0.75 X 0.6 X 0.25 = Rs. 1,539
Therefore, required expenditure = 5 X 1,539 = Rs. 7,695
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