Correct Answer - Option 3 : Rs. 50
Given∶
An offer, “Buy 6 get 3 free”
Additional discount 10%, and earns profit of 20 % on the whole transaction.
Formula Used∶
Cost Price = Selling Price × 100 / (100 + gain%)
Selling Price = Marked price – Discount
Discount % = (Discount / Marked Price) × 100
Calculation∶
Given marked price of each shirt be 100
Discount = 10% of M.P
⇒ (10 / 100) × 100
⇒ 10
S.P of 1 shirt = 100 – 10 = 90
S.P of 6 shirts = 90 × 6 = 540
Total cost price of 9 shirts = Selling Price × 100 / (100 + gain%)
⇒ (540 × 100) / 120
⇒ Rs. 450
Cost price of 1 shirt = Rs. 450 / 9 = Rs. 50
∴ The cost price of each shirt is Rs. 50.