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Why is this NOT a combination lock?
Take a look at these notes & examples of combinations and permutations.
Click to select a larger image.
Right click to view or save to desktop.
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Download Free Combinations Permutations Introduction .pdf file
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Counting 7's
1) If you listed all the whole numbers between 1 and 1000, how many 7's would appear in the list?
2) How many integers between 1 and 1000 contain at least one 7?
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Connections:
In Gate 2/Algebra: Introduction to Probability: Review basic concepts
Detailed explanation and examples of combinations, permutations from themathpage.com
AP Statistics tutorials from StatTrek.com
VIDEO: Videos explaining combinations & permutations and other probability topics from khanacademy.org
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Math Comic #162 - "Count-ing Principle" (10-29-14) - Dracula teaches at Transylvania night school
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Mathplane Weekly Webcomic #36 6-10-12 (click right corner)
Combinations vs. Permutations
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<--- Questions and Treasure Chest Puzzle
<--- Solutions
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Webcomic #120 (1-8-14) "Factorials!"
Exclamation Point?
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