Question

The average salary of $120$ employees in the bank is Rs.$15,000$ per month. If the no of assistant is thrice the no of POs and average salary of assistant is ${\frac{1}{3}}^{rd}$ of the average salary of POs then find the average salary of POs ?

Answer 1

$120=1:3=30:90=$ PO $:$ Assistant

$120\times 15000=30\times x+90\times \frac{x}{3}$

$18,00,000=90x+90\times \frac{x}{3}$

$54,00,000\times 3=180x$

$X=30000$