Question

A shopkeeper bought 11 hair clips for rs 10 and sold 10 for rs 11 find his gain or loss per cent.

Answer 1

Hope it helps....

LCM of 11 and 10 is 110.

CP of 11 hair clips= ₹10
CP of 1 hair clip= ₹10/11
Total CP= (₹10/11)×110 =₹100

Now, SP of 10 hair clips= ₹11
SP of 1 hair clip= ₹11/10
Total SP= (₹11/10)×110 =₹121

As, SP > CP, there is gain.

So, Gain= SP -CP
= ₹(121-100)
= ₹21

Now, Gain%= {(Gain/CP)×100)%
= {(21/100)×100}%
= 21%

Therefore, there is a gain of 21%.

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Answer 2

Answer:

Step-by-stepLCM of 11 and 10 is 110.

CP of 11 hair clips= ₹10

CP of 1 hair clip= ₹10/11

Total CP= (₹10/11)×110 =₹100

Now, SP of 10 hair clips= ₹11

SP of 1 hair clip= ₹11/10

Total SP= (₹11/10)×110 =₹121

As, SP > CP, there is gain.

So, Gain= SP -CP

= ₹(121-100)

= ₹21

Now, Gain%= {(Gain/CP)×100)%

= {(21/100)×100}%

= 21%

Therefore, there is a gain of 21%. explanation: