The average revenues of 7 consecutive years of a company is Rs 75 lakhs. If the average of first 4 years is Rs 70 lakhs and that of last 4 years is Rs 82 lakhs, what will be the revenue for the 4th year.
Total revenues of 7 years of the company = $$75 \times 7$$ = Rs. 525 lakhs
Total revenue of first 4 years = $$70 \times 4$$ = Rs. 280 lakhs
Total revenue of last 4 years = $$82 \times 4$$ = Rs. 328 lakhs
$$\therefore$$ Revenue of 4th year = (280 + 328) - 525 = 608 - 525
= Rs. 83 lakhs
=> Ans - (B)
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