In a company with 600 employees, the average age of the male employees is 42 years and that of the female employees is 41 years. If the average age of all the employees in the company is 41 years 9 months, then the number of female employees is:

150

Let number of female employee = a

ATQ ,

a × 41 + ( 600 - a ) × 42 = 600 ×  41\(\frac{3}{4}\)

41a + 25200 - 42a = 600 × \(\frac{167}{4}\)

25200 - a = 25050

a = 150

So , number of females are = 150