A fruit seller buy some fruit at the rate of 11 for rupees 10. And the same of 9 for rs 10. If all the fruits are sold for rs 1 each. Find gain or loss.

A fruit seller buy some fruits at the rate of 11 for rupees 10 and the same number at the rate of 9 for rupees 10 if all the fruits are sold for rupees 1 each find the gain or loss percentage?