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    Question

    ┬а Mean salary of total 100 employees was given to be

    800. Also, mean salary of male and female employees was 400 and 900 respectively. Find the percentage of female employees.
    A 30% Correct Answer Incorrect Answer
    B 40% Correct Answer Incorrect Answer
    C 20% Correct Answer Incorrect Answer
    D 80% Correct Answer Incorrect Answer
    E 10% Correct Answer Incorrect Answer

    Solution

    Use formula of combined mean to find Nf / (Nf+Nm). Combined Mean = {Nm (400) + Nf (900)} / 100 800 * 100 = (100 тАУ Nf) 400 + Nf 900 80,000 = 40,000 тАУ 400 Nf + 900 Nf 40,000 = 500 Nf Nf = 80 % of female employees = 80/100 = 0.8 or 80%

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