1 Answers
Option 4 : 28%
Alternate MethodCP ∶ SP = (100 - D%) ∶ (100 + P%)
⇒ CP ∶ SP = (100 - 10) ∶ (100 + 15) = 18 ∶ 23
Profit = 23 - 18 = 5 units
Profit % = (5/18) × 100 ≈ 28%
∴ The required profit is 28%.
Traditional method:
Given:
A dealer bought an article at 10% discount on its marked price
Gain = 15% on MP
Formula used:
MP(1 - D%/100) = SP
where,
MP = Marked Price
SP = Selling price
D = Discount
Profit % = (SP - CP)/CP × 100
Calculation:
Let marked price of article be p
Now according to question,
CP = MP × (1 − 10/100)
⇒ CP = p × 90/100
⇒ CP = 0.9p
SP = MP(1 + 15/100)
⇒ SP = p(23/20) = 1.15p
Profit = 1.15 p − 0.9 p
⇒ 0.25 p
Profit % = {0.25/0.9} × 100
⇒ 27.778% ≈ 28%
∴ The gain per cent (correct to the nearest integer) is 28