In the annual seminar of three companies A, B, and C, some male and female employees represent their respective companies. The average number of femal...

In the annual seminar of three companies A, B, and C, some male and female employees represent their respective companies. The average number of female employees representing companies A and B is 420. The total number of male employees in companies A and B is 1620. The number of female employees is $\frac{3}{4}$ and the number of male employees is $\frac{5}{8}$ of the total employees in companies A and B respectively. The total female employees representing company C are 25% more than the total female employees representing company A. The total male employees representing company C are 33% more than the total female employees representing company B.

Find the average number of female employees in companies B and C.