Perms & Combs: Combinations Part I 520

This lesson is part of the series: Permutations & Combinations

This 53 minute perms & combs lesson is all about combinations and the difference between a combination and a permutation. It really should be called a permutation lock rather than a combination lock! This lesson will show you how to use:
- the formula for a permutation
- the formula for a combination
and to answer questions on:
- numbers in lotteries
- letters in a word
- people on committees
- sums of money
- selections from objects
- cards in a standard deck

Sample question: A student council has 10 members, 6 girls & 4 boys. A committee of 6 is chosen to plan for a dance In how many ways can this be done if Mary (one of the 6 girls) must be on the committee?

This lesson contains explanations of the concepts and 16 sample questions with step by step solutions plus 6 interactive review questions with solutions.

Lessons that will help you with the fundamentals of this lesson include:
- 230 Solving Quadratic Equations by Factoring (http://www.mindbites.com/lesson/5087)
- 505 Factorial Notation & Linear Permutations (http://www.mindbites.com/lesson/5105)

All lessons have been prepared by a certified teacher, B.A., B. Ed. (Math Major) with 30+ years experience teaching Math to High School Students and Continuing Education learners. She has a reputation for teaching the math class that “you want to be in.” For more information please visit Math Made Simple: http://www.mathmadesimple.com/

Through her teaching and tutoring experiences, the growth of technology and the internet she recognized a need to make comprehensive math lessons available via the Internet to help:

- High school students who have missed a class or maybe just need a little extra help or are in sports or other extra curricula activities
- Teachers looking for a way...

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