Q. 97

A lady buys some pencils for Rs 3 and an equal number for Rs 6. She sells them for Rs 7. Find her gain or loss%.

Answer :

Given that, cost price of some pencils = Rs.3 and for other equal no. of pencils = Rs.3 and total selling price = Rs.7.

Let lady buys ‘n’ pencils for Rs.3.(type - 1)



And for ‘n’ pencils of other kind, she paid Rs.6(type - 2)



she sold n + n = 2n pencils for Rs.7



Now, for type - 1 pencils -


Gain = selling price - cost price







Now, for type - 2 pencils -


Loss = cost price - selling price







Net gain % = Gain % - Loss %




= 25%


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