Purchases 11 oranges for Rs 10

Sells 10 oranges for Rs 11

Percent Profit= 21%

Cross-multiplying,we get (11*11-10*10)/100=21%

Verified answer

Answer:

C.P pf 11 oranges = Rs 10

∴ C.P pf 1 orange = Rs ( 11/10)

Also, S.P of 10 oranges = Rs 11

∴ S.P of 1 orange = Rs ( 10/11 )

Now, profit = S.P .- C.P.= 10/11 − 11/10 =Rs 110/21

∴ Profit % = 11/10 / 110/21 ×100=21%