Question : The average expenditure of Raman for 5 days is Rs. 160. If his expenditure for the first 4 days is Rs. 90, Rs. 135, Rs. 75, and Rs. 180 respectively, then what is his expenditure on the 5th day?
Option 1: Rs. 360
Option 2: Rs. 320
Option 3: Rs. 280
Option 4: Rs. 250
Correct Answer: Rs. 320
Solution :
The average expenditure of Raman for 5 days = Rs. 160
The sum of his expenditure in 5 days = 160 × 5 = Rs. 800
Expenditure for the first 4 days = Rs. 90 + Rs. 135 + Rs. 75 + Rs. 180 = Rs. 480
Expenditure on the 5th day = 800 – 480 = Rs. 320
Hence, the correct answer is Rs. 320.
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