The average monthly salary of 12 workers and 3 managers in a factory was Rs. 600. When one of the manager whose salary was Rs. 720, was replaced with a new manager, then the average salary of the team went down to 580. What is the salary of the new manager?

• ক 570
• খ 420 ✅ সঠিক উত্তর
• গ 640
• ঘ 690