Question : The average revenue for seven consecutive years of a company is Rs. 75 lakhs If the average of the first 4 years is Rs. 70 lakhs and that of the last 4 years is Rs. 82 lakhs, what will be the revenue for the 4th year?
Option 1: Rs. 85 lakhs
Option 2: Rs. 83 lakhs
Option 3: Rs. 81 lakhs
Option 4: Rs. 79 lakhs
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Correct Answer: Rs. 83 lakhs
Solution :
Given:
Average revenue of 7 consecutive years = Rs. 75 lakhs
Average revenue of first 4 years = Rs. 70 lakhs
Average revenue of last 4 years = Rs. 82 lakhs
Total revenue of 7 years = Average revenue × Number of years = 75 × 7
= Rs. 525 lakhs
Total revenue of first 4 years = Average revenue × Number of years.
= 70 × 4 = Rs. 280 lakhs
Total revenue of the last year = Average revenue × Number of years = 82 × 4
= Rs. 328 lakhs
Thus, revenue of the 4th year = Rs. 280 + Rs 328 – Rs.525 = Rs. 83 lakhs
Hence, the correct answer is Rs. 83 lakhs.
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