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ATQ, Let the income be Rs. '100n' Amount spent on house rent = 0.15 × 100n = Rs. '15n' Remaining income = 100n - 15n = Rs. '85n' Amount spent on groceries = 0.30 × 85n = Rs. '25.5n' Remaining income = 85n - 25.5n = Rs. '59.5n' Amount spent on education = 0.40 × 59.5n = Rs. '23.8n' Remaining income = 59.5n - 23.8n = Rs. '35.7n' Savings = (7/10) × 35.7n = '24.99n' So, 24.99n = 12,000 Or, 'n' = 480 Required amount = 23.8 × 480 = Rs. 11,424
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