Given information:
- The shopkeeper bought 11 hair clips for Rs 10.
- The shopkeeper sold 10 hair clips for Rs 11.

To find:
The gain or loss percent for the shopkeeper.

Solution:

Step 1: Calculate the cost price per hair clip.
Cost price per hair clip = Total cost / Total number of hair clips bought

Given that the shopkeeper bought 11 hair clips for Rs 10, we can calculate the cost price per hair clip as follows:

Cost price per hair clip = 10 / 11
Cost price per hair clip = Rs 0.909

Step 2: Calculate the selling price per hair clip.
Selling price per hair clip = Total selling price / Total number of hair clips sold

Given that the shopkeeper sold 10 hair clips for Rs 11, we can calculate the selling price per hair clip as follows:

Selling price per hair clip = 11 / 10
Selling price per hair clip = Rs 1.10

Step 3: Calculate the gain or loss.
Gain or loss = Selling price per hair clip - Cost price per hair clip

Gain or loss = 1.10 - 0.909
Gain or loss = Rs 0.191

Step 4: Calculate the gain or loss percent.
Gain or loss percent = (Gain or loss / Cost price per hair clip) * 100

Gain or loss percent = (0.191 / 0.909) * 100
Gain or loss percent = 21%

Conclusion:
The shopkeeper has a gain of 21%. This means he made a profit of 21% on each hair clip he sold.

Cost of 11hair clips =10So,coat of 1 hair clip =11/10=1.1
Selling prise:
Sp of 11= 10 Sp of 1=11/10=1.1
SP=1.1CP=1.1HENCE NO PROFIT NO LOSS