A person spends 10% of his income on groceries, 10% on medicines, 20% on children’s education, 15% on house rent, and he saves the remaining amount. If his monthly income is ₹30,000, find his savings. 

Expenses on groceries = 10% of ₹30,000 = 0.10 × 30,000 ⇒ Expenses on groceries = ₹3,000 Expenses on medicines = 10% of ₹30,000 = 0.10 × 30,000 ⇒ Expenses on medicines = ₹3,000 Expenses on children's education = 20% of ₹30,000 = 0.20 × 30,000 ⇒ Expenses on children's education = ₹6,000 Expenses on house rent = 15% of ₹30,000 = 0.15 × 30,000 ⇒ Expenses on house rent = ₹4,500 Total expenses = ₹3,000 + ₹3,000 + ₹6,000 + ₹4,500 ⇒ Total expenses = ₹16,500 Savings = ₹30,000 - ₹16,500 ⇒ Savings = ₹13,500 The savings are ₹13,500.