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## Comment on

Introduction to Combinations## I could not find part two of

## Thanks for the heads up!

Thanks for the heads up!

I have fixed the broken link.

Cheers,

Brent

## Cant understand the

## Link #1: http://greprepclub

Link #1: http://greprepclub.com/forum/set-s-consists-of-5-objects-1900.html

Link #2: http://greprepclub.com/forum/qotd-23-s-2619.html

The solution for question #1 is not applying the Mississippi rule. It's applying the combination formula.

That is, we can choose 4 objects from 5 objects in 5C4 ways.

5C4 = 5!/(4!1!)

The solution for question #2 also applies the combination formula.

Does that help?

Cheers,

Brent

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