CTET 2 Math and Science 23 Dec 2021 Paper

Let assume that CP = Rs.100
MP = CP + 30%
⇒ Marked Price = 100 + 30% of 100
⇒ Marked price = 100 + 30 = Rs.130
Discount = 20% of marked price
⇒ Discount = 20% of 130
⇒ Discount = Rs. 26
⇒ Selling price = 130 - 26 = Rs. 104
Gain = Selling Price - Cost Price
⇒ Gain = 104 - 100 = Rs. 4
Gain% = 4/100×100
⇒ Gain% = 4%
∴ His gain% is 4%.
The correct option is 2 i.e. gain 4%