The average monthly salary of 24 employees in an organisation is Rs. 2400. If the manager's salary is added, then the average salary increases by Rs. 100. What is the manager's monthly salary? Choose the correct answer
A) rs . 3601 B) rs . 3618 C) rs . 4900 D) rs . 3619 E) rs . 3610

Rationale: "manager ' s monthly salary = rs . ( 2500 * 25 - 2400 * 24 ) = rs . 4900 answer : c"
Answer: C