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1). Rs 15002). Rs 20003). Rs 18504). Rs 1950 |
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Answer» Average expenditure of days 1 to 10 = Rs 800 Total expenditure for days 1 to 10 = Rs 800 × 10 = 8000 ⇒ Total expenditure for days 11 to 20 = Rs (800 – 25) × 10 = Rs 775 × 10 = Rs 7750 ⇒ Total expenditure for days 21 to 30 = Rs (775 – 25) × 10 = Rs. 750 × 10 = Rs. 7500 ∴ Total expenditure = Rs (7500 + 7750 + 8000) = Rs. 23250 Now, we KNOW that, ⇒ Savings = Income – Expenditure = Rs 25000 – Rs 23250 = Rs 1750 |
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