Question

Mohan bought a certain number of notebooks for rs600.He sold 1/4of them at 5 percent loss.Atwhat price should he sell the remaining notebooks so as to gain 10percent on the whole.

Answer 1

assume there was 600 book each c.p rs 1
600/4*95/100+600*3/4*x/100=600*110/100
142.5+(9/2*x)=660
(9/2*x)=660-142.5
9/2*x=457.5
x=101.666
gain=1.666%