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Employees

by okigbo » Fri Oct 30, 2009 3:32 pm
Each employee is either a director or a manager. What % of the employees are directors?
a. The average salary of managers is $5000 less than the average of all employees
b. The average salary of directors is $15000 greater than the average of all employees
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Source: — Data Sufficiency |
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by mehravikas » Sat Oct 31, 2009 6:58 pm
Is it c?
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by okigbo » Sun Nov 01, 2009 11:38 am
Yes
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by mehravikas » Mon Nov 02, 2009 11:28 am
If you know the average of the two groups or their difference from the combined average, then you can find out the number of people of or % of people in a group.
okigbo wrote:Yes
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