ATQ, Let the income of Ravi be Rs. '100x' Amount spent on food = '100x' X 0.5 = Rs. '50x' Amount spent on rent = '100x' X 0.1 = Rs. '10x' Amount spent on groceries = '100x' X 0.2 = Rs. '20x' Remaining income = ('100x' - '50x' - '10x' - '20x') = Rs. '20x' Savings of Ravi = '20x' X 0.7 = 2,100 Or, 14x = 2,100 Or, x = 2,100 ÷ 14 = 150 Therefore, income of Ravi = 100x = 100 X 150 = Rs. 15,000
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