AFCAT Model Paper 1

Given:
The selling price of 10 articles = Cost price of 11 articles
Calculation:
Let the gain percentage be x%.
Let S.P represents the selling price
and C.P represents the cost price
According to the question,
10×S.P=11×C.P
⇒ S.P=

11

10

×C.P
We know that,
⇒ Selling price = Cost price ×(1+

gain‌percentage

100

)
Replacing value of selling price we get,
⇒

11

10

×C.P=C.P×(1+

x

100

)
⇒

11

10

−1=

x

100

⇒ x = 10%
Hence, the gain percentage is 10%.