## Video Links 12-2

**Videos:**

Counting using Combinations (time: 9:56)

Combinations (time: 10:15)

… See the whole entry

**Videos:**

Counting using Combinations (time: 9:56)

Combinations (time: 10:15)

… See the whole entry

Here is a comparison of permutations and combinations.

http://www.mathsisfun.com/combinatorics/combinations-permutations.html

Combinations:

http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/col_alg_tut57_comb.htm

A slightly more advanced discussion of combinations can be found here:

http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/col_alg_tut57_comb_ans.htm… See the whole entry

**Problems 1-2**

There are many problems throughout the text labeled IN YOUR OWN WORDS. Just relax; do not be afraid to give your opinion. For the most part, these questions do not have “right” or “wrong” answers. You should spend … See the whole entry

**Problems 1-2**

There are many problems throughout the text labeled IN YOUR OWN WORDS. Just relax; do not be afraid to give your opinion. For the most part, these questions do not have “right” or “wrong” answers. You should spend … See the whole entry

**Problems 1-2**

These problems provide the main ideas for this section.

Be sure you know the formula for combinations.

**Problems 3-32**

Use the formula for permutations to answer these questions. See Examples 5, 6 and 9.

**Problems 33-42**

These are … See the whole entry

- Distinguish permutations and combinations
- License plate problem
- Which method?

**Fundamental Counting Principle
**If one task can be performed in

- Committee problem
- definition
- combination formula
- deck of cards

- Pascal’s triangle
*n*choose*r*- table entries

- Counting with the binomial theorem
- binomial theorem
- number of subsets

**Combinations
**A combination of