17. A shopkeeper bought 11 pencils for10 and sold at 10 for? 11. Find

1.	17. A shopkeeper bought 11 pencils for10 and sold at 10 for? 11. Find his gain or loss per cent.n9Mathematics-T
Answer» Cp of 11 pencil = rupee 10 Sp of 10 pencil= rupee 11 Here ,we can see that the quantity of pen in both the cases of Sp and Cp is different Hence , we have to equal the quantity Cp of 110 pencil (11 ×10) = 100 (10 ×10) Sp of 110 pencil (10 ×11) = 121 (11 ×11 ) Now ,the quantity are same Since,SP > CP So ,there is a profit Profit = Sp - Cp =₹121 - ₹100 =₹21 Profit %= P/Cp × 100 =21/100 ×100 =21%

17. A shopkeeper bought 11 pencils for10 and sold at 10 for? 11. Find his gain or loss per cent.n9Mathematics-T

Answer»

Cp of 11 pencil = rupee 10

Sp of 10 pencil= rupee 11

Here ,we can see that the quantity of pen in both the cases of Sp and Cp is different

Hence , we have to equal the quantity

Cp of 110 pencil (11 ×10) = 100 (10 ×10)

Sp of 110 pencil (10 ×11) = 121 (11 ×11 )

Now ,the quantity are same

Since,SP > CP

So ,there is a profit

Profit = Sp - Cp

=₹121 - ₹100

=₹21

Profit %= P/Cp × 100

=21/100 ×100

=21%