Question

10 . pens are bought at 12 for rupee and sold at 9 for a rupee . find the gain %​

Answer 1

Step-by-step explanation:

cp = 12

sp = 9

Pens are bought at 12 for a rupee sold at 9 for a rupee. Find the gain or loss %.

Pens are bought of 12 for a rupee

Cost price(c.p) of the 12 pens=Re. 1

Cost price (c.p) of 1 pen=Rs.

12

1

Now, to

Selling price(s.p) of 9 pens=Re. 1

Selling price(s.p) of 1 pen=Rs.

9

1

Gain=s.p−c.p

=Rs. [

9

1

−

12

1

]

=Rs. [

36

4−3

]=Rs.

36

1

Gain%=

c.p

Gain

×100=

12

1

36

1

×100= 36/12 ×100

= 3/100

=33.33%.