Correct Answer - Option 3 : Rs. 3000
Given:
Marked price = Rs. 4000
Discount = 10%
Profit = 20%
Formula used:
SP = MP × [(100 – Discount%)/100]
CP = SP × [100/(100 + Gain%)]
Calculation:
SP = Rs. 4000 × (90/100)
⇒ Rs. 3600
CP = Rs. 3600 × (100/120)
⇒ Rs. 3000
∴ The cost price of article is Rs. 3000