Question

the selling price of 10 pencils is equal to the cost price of 11 pencils .What is the profit percentage?

Answer 1

SP of 10 pencils=x
SP of 1 pencil =x/10
CP of 11 pencils =x
CP of 1 pencil = x/11
profit = (x/10)-(x/11)
= (11x - 10x)/110
= x/110
profit percent=[{(x/110)/(x/11)} × 100] %
=10 %

Answer 2

Answer:

Step-by-step explanation:

sp of 10 pencils=cp of 11 pencil=x

so cp of one pencil=x/11

and sp of one pencil is =x/10

profit=sp-cp=x/10-x/11

                     =x/110

profit %=profit*100/cp

              =x*100*11/110*x=10%

so profit percentage=10%