A man sold two houses for Rs. 7.81 lakhs each. On one

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A man sold two houses for Rs. 7.81 lakhs each. On one he gained 5% and on the other he lost 5%. What percent is the effect of the sale on the whole ?

1. 0.25% loss
2. 0.25 % gain
3. 25 % loss
4. 25 % gain

Correct Option: A

Loss% ( common gain or loss % / 10)²
= ( 5/10 )² = 1/4 % = 0.25%