If the cost price of 20 books is equal to the selling price of 18 books , find the gain percent.
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Answer:
100%
Step-by-step explanation:
Let the cost price be 100
Cost price of 20 books = 20×100 = 2000
Selling price of 18 books = 2000
Selling price of 1 book = 2000/18
Profit = SP - CP
= 2000/18 - 100
= 2000-100/18
= 200/18
Profit % = Profit/CP × 100
= 200/18/100 × 100
= 200/18
= 100%
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