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| Math Central | Quandaries & Queries |
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Question from martine, a parent: how many different combinations can be made from numbers 1 to 20 using them only once in a six number scale |
Martine,
It depends whether order is important or not. For example are 1, 2, 3, 4, 5, 6 and 2, 1, 3, 4, 5, 6 different? If they are and hence order is important mathematicians call them permutations and you can calculate how many there are using my response to a similar question from David. If order is not important then mathematicians call them combinations and you can calculate how many there are using my response to a similar question from Marcus.
Write back if you need further assistance,
Penny
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