A person needs to pay Tk. 500 to buy pencils and Tk. X for any additional unit of pencil. If the coustomer pays a total of Tk. 4,700 for 1200 pencils, what is the value of X?

• ক 3.91
• খ 3.5 ✅ সঠিক উত্তর
• গ 3.85
• ঘ 4