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 (http://www.mindbites.com/lesson/5087)
 505 Factorial Notation & Linear Permutations (http://www.mindbites.com/lesson/5105)
About this Author
 Teacher Sydney
 65 lessons
 Joined:
07/02/2009
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.
These lessons are a convenient and easy way to get math help. Pick and choose only the lesson(s) or packages (series) that you want. There are free previews. You might look at the Transcripts for a quick review of the lesson content.
For a complete list of lessons available on MindBites (mathmadesimple.mindbites.com. To access free previews.
To Contact us please email mathmadesimple.com@gmail.com
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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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