The average revenues of 7 consecutive years of a company is Rs 79 lakhs. If the average of first 4 years is Rs 74 lakhs and that of last 4 years is Rs 86 lakhs, what is the revenue for the 4th year?
Total revenues of 7 years of the company = $$79 \times 7$$ = Rs. 553 lakhs
Total revenue of first 4 years = $$74 \times 4$$ = Rs. 296 lakhs
Total revenue of last 4 years = $$86 \times 4$$ = Rs. 344 lakhs
$$\therefore$$ Revenue of 4th year = (296 + 344) - 553 = 640 - 553
= Rs. 87 lakhs
=> Ans - (A)
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