A Monopolist Can Sell 10 Wangdoodles If He Charges $10

question 43

Multiple Choice

A monopolist can sell 10 wangdoodles if he charges $10 per wangdoodle and 11 wangdoodles if he charges $9.The MR from selling the 11th wangdoodle is

• A)-$1.
• B)$1.
• C)$9.
• D)$99.