Hi Turkish,
This question can be solved by TESTing THE ANSWERS.
We're told that a company is comprised of 60% female employees. After hiring an ADDITIONAL 20 male employees, the company is then comprised of 55% female employees. We're asked for the TOTAL number of employees that the company had AFTER hiring the 20 additional male employees.
We need to start with the initial group of employees, which means that we have to SUBTRACT 20 from each of the answer choices before we start our calculations.
Let's TEST Answer B: 220
220 - 20 = 200 original employees
60%(200) = 120 females
After the 20 males were hired...
120/220 = 12/22 = 5/11 = .4545 = about 45.5% female
This is TOO SMALL. Eliminate B.
Let's TEST Answer D: 360
360 - 20 = 340 original employees
60%(340) = 204 females
After the 20 males were hired....
204/360 = 51/90 = 17/30 = 56.666 = 56 2/3% female
This is TOO BIG. Eliminate D.
Since Answer B is too SMALL and Answer D is too BIG, the correct answer MUST be between these two...
Final Answer:
GMAT assassins aren't born, they're made,
Rich
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