Correct Answer - Option 3 : A

Given:

Cost price of 2 pens = Rs. 340

Discount percentage = 15%

Calculations:

Cost price of 2 pens = Rs. 340

Cost price of 1 pen = Rs. 170

Let the marked price be Rs. x

After giving 15% discount, the price of each pen is Rs. 170.

x × 85% = 170

⇒ x = Rs. 200

∴ The marked price of each pen is Rs. 200.