Hey how u do this one
the average salary of male m employess and f female employees is a.andavgsalaryofmaleareb. find female average
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Total salary of m males and f females is (m+f)a.Thetotalsalaryofmmalesismb. Therefore total salary of f females is (m+f)a - mb which is equal to ma + fa - mb.
So avg salary of f females = (ma + fa - mb)/f.