A 4-person task force is to be formed from 4 men and 3 women who work in Comany G's human resource department. If there are to be 2 men and 2 women on the task force, how many different task forces can be formed?
14
18 *Correct*
35
56
144
If someone could help me out I would appreciate it very much. Thank you.
Word problem
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This is a two stage combination problem (we know its combination because the order doesn't matter).
First we want to find out, out of 4 candidates, how many combinations of 2 men there are:
Ans = N!/(k!(N-k)!) = 4!/(2!(4-2)!) = 6 different men combinations
Second, we want to calculate, out of 3 candidates, how many women combinations there are:
(same formula) = 3!/(2!(3-2)1) = 3
Since each man combo can have any of the 3 woman combination, we multiply to get 18 total different combinations.
Hope this helps, good luck.
First we want to find out, out of 4 candidates, how many combinations of 2 men there are:
Ans = N!/(k!(N-k)!) = 4!/(2!(4-2)!) = 6 different men combinations
Second, we want to calculate, out of 3 candidates, how many women combinations there are:
(same formula) = 3!/(2!(3-2)1) = 3
Since each man combo can have any of the 3 woman combination, we multiply to get 18 total different combinations.
Hope this helps, good luck.
Ryan S.
| GMAT Instructor |
Elite GMAT Preparation and Admissions Consulting
www.VeritasPrep.com
Learn more about me
| GMAT Instructor |
Elite GMAT Preparation and Admissions Consulting
www.VeritasPrep.com
Learn more about me