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The average annual expenditure of an employee for 10 years from 1981 to 1990 was Rs. 4500. He spent Rs. 3200 in 1981 and Rs. 5700 in 1991. Find his average yearly expenditure during the ten years from 1982 to 1991.

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Rs. 4650

Rs. 5500

Rs. 4500

Rs. 4750

answer is D.

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Detailed Solution

Total expenditure in between 1981 to 1990 $= 4500 \times 10 = 45000$

$S p e n d 3200 i n 1981 = 45000 - 3200 = 41, 800$

Spend 5700 in 1991 $= 41800 + 5700 = 47500$

Expenditure in between $1982 - 1991 = 47500$

$A v e r a g e = \frac{47500}{10} = 4750$

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