1.  The average monthly salary of 20 employees in an organisation is ₹ 1500. If the manager's salary is added, then the average salary increases by ₹ 100. What is the manager's monthly salary ?
A. ₹ 2000
B. ₹ 2400
C. ₹ 3600
D. ₹ 4800

Answer: Option C

Explanation:

Manager's monthly salary
= ₹ (1600 x 21 - 1500 x 20)
= ₹ 3600