Question

6. A man buys two pens at Rs 20 each. He sells one at a gain
of 5%
and other at a loss of 5% - Find
his gain or loss percent. .
​

Answer 1

Answer:

Cost of 1st pen=10 rupees

Cost of 2nd pen=10 rupees

Let be find the S.P of 1st pen-

C.P=10 rupees

Profit=5%

S.P=C.P×(100+profit%/100)

S.P=10×(100+5%/100)

S.P=10×105/100

S.P=21/2 rupees

Let be find the S.P of the 2nd pen-

C.P=10 rupees

Loss=5%

S.P=C.P×(100-loss%/100)

S.P=10×(100-5%/100)

S.P=10×95/100

S.P=19/2 rupees

Let be find the gain or loss-

Firstly, We find the total C.P-

C.P+C.P

10 rupees+10 rupees=20 rupees

Let be find the total S.P-

S.P+S.P

21/2 rupees+19/2 rupees

40/2 rupees=20 rupees

Total C.P= 20 rupees

Total S.P=20 rupees

He has no profit and no loss....

Hope this will help you..