If the cost price of 18 articles is equal to the selling

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If the cost price of 18 articles is equal to the selling price of 16 articles, the gain or loss is

1. 25% gain
2. 25% loss
3. 12 1 % loss
  2
4. 12 1 % gain
  2

Correct Option: D

Let cost price of 1 article = $ 1
Then , Cost price of 16 articles = $ 16
Selling price of 16 articles = $ 18
Profit = Selling price of 16 articles - Cost price of 16 articles = 18 - 16 = $ 2

Percentage profit =	Profit	× 100
	Cost price of 16 articles

Percentage profit =	2	× 100
	16

Percentage profit =		25	= 12	1	%
		2		2

Second method to solve this question :
Here, p = 18, q = 16

Gain % =			p - q		× 100
			q

Gain % =			18 - 16		× 100
			16

Gain % =	2	× 100
	16

Gain % =		25	= 12	1	%
		2		2

12	1	% loss
	2

12	1	% gain
	2