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Combinations: Combinations Part I 520


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About this Lesson

  • Type: Video Tutorial
  • Length: 52:50
  • Media: Flash video file
  • Use: Watch Online
  • Access Period: 90 Days
  • Posted: 08/04/2009

This lesson is part of the following series:

Permutations & Combinations (8 Lessons) (8 lessons, $27.72)

This 53 minute combinations 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 (
- 505 Factorial Notation & Linear Permutations (

About this Author

Teacher Sydney
Teacher Sydney
65 lessons

Teacher Sydney is a certified teacher, B.A., B. Ed. (Math Major). She prepared a math help program consisting of 65 very comprehensive, plain and "no fluff" math video lessons.
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This is a 53 minute Combinations math help lesson
The difference between a combination and a permutation
Questions and answers using the combinations formula for:
- numbers in lotteries
- people on committees
- cards in a standard deck of cards
- sums of money etc.
Solve equations using the combinations formuls

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