3 Questions
Which of the following is the formula for calculating permutations?
n! / (n-r)!
What is the difference between permutations and combinations?
Permutations involve the order of items, while combinations do not.
What is the formula for calculating combinations?
n! / r!
Study Notes
Permutations and Combinations
Permutations Formula
- The formula for calculating permutations is: nPr = n! / (n-r)!
- Where 'n' is the total number of items and 'r' is the number of items chosen.
Permutations vs Combinations
- A permutation is an arrangement of objects in a specific order, whereas a combination is a selection of objects without regard to order.
- For example, the permutations of ABC are ABC, ACB, BAC, BCA, CAB, and CBA, while the combinations of ABC are AB, AC, and BC.
Combinations Formula
- The formula for calculating combinations is: nCr = n! / (r!(n-r)!)
- Where 'n' is the total number of items and 'r' is the number of items chosen.
Test your knowledge of permutations and combinations in mathematics with this quiz! Explore the formulas for calculating permutations and combinations and learn about the key differences between the two concepts.
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