Combinations...2

[mathdad]

Suppose we have a collection of n objects. A combination of these n objects taken r at a time is any selection of r of the objects where order does not matter.

Find the number of combinations of numbers 4, 5, 6 taken two at a time.

Let me see.

{4, 5}, {4, 6}, {5, 6}

There are 3 combinations of numbers 4, 5, 6 taken two a time.

You say?

 

[blamocur]

Correct.

 

[mathdad]

Correct.

Good. How about my thread Combinations...1?

 

[blamocur]

Good. How about my thread Combinations...1?

If I had anything to contribute I'd post it in that thread.