SOLUTION: How many combinations of 3 numbers are there in 23 numbers, when the order of each group doesn't matter? EX: Group A would be 1,2,3 OR 2,3,1 OR 3,2,1 OR 1,3,2, etc... These woul

Question 891919: How many combinations of 3 numbers are there in 23 numbers, when the order of each group doesn't matter?
EX: Group A would be 1,2,3 OR 2,3,1 OR 3,2,1 OR 1,3,2, etc... These would all be considered the same group.
Answer by Edwin McCravy(20054) (Show Source): You can put this solution on YOUR website!

That the combinations of 23 things taken 3 at a time.

 = 1771

Notice that the top and bottom both contain 3 factors.
Each successive factor is one less than the preceding factor.
We begin the numerator with 23 and the denominator with 3.

This is sometimes written as C(23,3), 23C3, or 

But it means 1771.

Edwin

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