Question

9. If the cost price of 10 copies equal to the selling price of 9 copies. Find the
gain or loss percent for
shopkeeper.​

Answer 1

Step-by-step explanation:

Let the C.P. be

′

x

′

& S.P. be

′

y

′

then 10x=9y .......(1) ..... as given

Profit =

x

y−x

×100

=(

x

y

−1)×100

From (1)

Profit=(

9

10

−1)×100

=

9

100

%=11

9

1

%.