Combinations

This video introduces combinations and explains how to evaluate combinations as well as solve counting problems using combinations.

[gooddeedsleadto]

One way to look a it.
Combinations:
Each column in a spreadsheet represents different subsets of the universal set.
Permutations:
Permutations:
Rows from top to bottom under each column or subset represent the arrangements of each subset or each column.

[johndateo]

Thanks. What drawing software do you use?

[lonoffd]

Great video! Just a small typo: there's an equal sign missing in the definition of C(n, r).

[madelinestraumanis]

I don’t have that calculator on my computer, so how am I suppose to figure those big ones out if I can’t compare my work to yours to see what I did wrong on the steps.

[gooddeedsleadto]

C(4, 2). C(5, 2) are similar to getting total Number of paths or events by going through the process of multiplying the two pathways? Please verify the understanding or visualization.

[Fabak]

yes i did find it very helpful! alott!!

[onesandzeroes]

Very useful. However, it's strange that he's using that bizarre and clumsy calculator (I guess it's supposed to emulate a physical one, with all its clumsiness). The number of steps you have to take to calculate a simple factorial is insane. It's so much easier on other software calculators.

[AdunlolaBakare]

me too. much better than my teacher in school

[stygers]

My calculator doesn't have that! MAN.