1.

1). Rs 15002). Rs 20003). Rs 18504). Rs 1950

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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