Task: Question Answering
Input (English): Problem: a starts a business with $ 3500. after 5 months, b joins with a as his partner. after a year, the profit is divided in the ratio 2: 3. b ' s contribution in the capital is
Options: a. 7000, b. 9000, c. 8000, d. 9900, e. 7900
Output (English): b