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%.
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%
Couldn't generate an explanation.
Generated by AI. May contain inaccuracies — always verify with your textbook.
