# Practice GMAT Questions

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**B**

- Since the order in which the group is selected does not matter, we are dealing with a combinations problem (and not a permutations problem).
- The formula for combinations is:

N!/((N-K)!K!)

Where N = the total number of elements from which we will select, 8 people in this case.

Where K = the total number of elements to select, 4 people in this case. - The total number of combinations is therefore:

8!/((8-4)!4!) = 70 - However, two of these combinations are not valid since they have all members of one gender.
- The correct answer is 70-2 = 68

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