"A shopkeeper purchases 11 knives in Rs. 10 and sells them to the rate of 10 knives for
Channel: Doubtnut
Date: 2020-04-05

"A shopkeeper purchases 11 knives in Rs. 10 and sells them to the rate
 of 10 knives for Rs. 11. He earns a profit of
`11 %`
b. `15 %`
c. `20 %`
d. `21 %`"