The average revenues of 9 consecutive years of a company is Rs 68 lakhs. If the average of first 5 years is Rs 63 lakhs and that of last 5 years is Rs 75 lakhs, find the revenue for the 5th year.
Total revenues of 9 years of the company = $$68 \times 9$$ = Rs. 612 lakhs
Total revenue of first 5 years = $$63 \times 5$$ = Rs. 315 lakhs
Total revenue of last 5 years = $$75 \times 5$$ = Rs. 375 lakhs
$$\therefore$$ Revenue of 5th year = (315 + 375) - 612 = 690 - 612
= Rs. 78 lakhs
=> Ans - (C)
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