The mean monthly salary of 500 employees of a company is rupees 5000, the mean monthly salary of male and female employees are rupees 5200 and rupees 4200 respectively find the number of male employees of the company
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Let the number of male employees be x.
Total number of employees=500
Then number of female employees is 500-x
Mean of 500 employees salary is 5000
Total salary of 500 employees is 500*5000=2500000
Total salary of employees = Total salary of male employees+Total salary of female employees
Total salary of male employees=5200*x=5200x
Total salary of female employees=4200*(500-x)
2500000=5200x+4200*(500-x)
=5200x+2100000-4200x
2500000-2100000=1000x
400000=1000x
x=400000/1000 =400
Therefore, number of male employees=400
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