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A permutation is just a way to arrange thing in a certain order. For example, the letters a and b can be permuted as ab and ba. Note there are two letters and 2 permutations. Think of it this way, There are two letters so 2 choices for the first letter and one choice for the second. So 2x1 is 2 If we had a,b and c There would be 3 choices for the first letter, it could be a or b or c, and once one of those is used, two choices for the second and then the last letter is the one left over. So there are 3x2x1=6 permutations. In general if we have n objects, there are nxn-1xn-2....3x2x1 which we write as n!.
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Can a permutation be made with negative numbers?
Yes, a permutation can be made with negative numbers. In mathematics, a permutation is an arrangement of objects in a specific order. Negative numbers can be included in a permutation just like any other integer. The order in which the negative numbers are arranged would be considered a valid permutation.
Does order matter in a permutation?
Yes
What is a general formula for the permutation nPr in terms of n and r For instance if you have the permutation nP1 how do you find n?
Permutation Formula A formula for the number of possible permutations of k objects from a set of n. This is usually written nPk . Formula:Example:How many ways can 4 students from a group of 15 be lined up for a photograph? Answer: There are 15P4 possible permutations of 4 students from a group of 15. different lineups
What is an arrangement in which order is important?
A permutation is the correct answer
What is a permutation in mathematics?
The arrangement of objects in different orders.
