A company has 120 employees with an average salary of ₹30,000 a month. Managers average ₹50,000 and all other employees average ₹25,000. How many managers are there?

Explanation

1. 01

   Managers : others = $(30{,}000 - 25{,}000) : (50{,}000 - 30{,}000) = 5{,}000 : 20{,}000 = 1 : 4$.

2. 02

   Total parts = $1 + 4 = 5$.

3. 03

   Managers = $\frac{1}{5} \times 120 = 24$.