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If each of the companies A and B invested Rs. 25 lakh in 2010, what was the average profit earned by the two companies?
Answer & Solution
Correct Answer:
Option
D
Average profit of A and B in 2010
$$\eqalign{ & = \frac{1}{2}\times\left[\left(\frac{90}{100}\times25\text{ lakh}\right)+\left(\frac{70}{100}\times25\text{ lakh}\right)\right] \cr & = \frac{1}{2}\times\left(\frac{45}{2}+\frac{35}{2}\right)\text{lakh} \cr & = \frac{80}{4}\text{ lakh} \cr & = \text{20 lakh} \cr} $$
$$\eqalign{ & = \frac{1}{2}\times\left[\left(\frac{90}{100}\times25\text{ lakh}\right)+\left(\frac{70}{100}\times25\text{ lakh}\right)\right] \cr & = \frac{1}{2}\times\left(\frac{45}{2}+\frac{35}{2}\right)\text{lakh} \cr & = \frac{80}{4}\text{ lakh} \cr & = \text{20 lakh} \cr} $$
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