What is a permutation?
Permutation and Combination

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•
Mathematics
•
10th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A permutation is an arrangement of objects in a specific order. The order matters in permutations.
2.
FLASHCARD QUESTION
Front
What is a combination?
Back
A combination is a selection of objects where the order does not matter.
3.
FLASHCARD QUESTION
Front
How many 2-digit numbers can be formed using the digits 1, 2, 3, & 4 without repeating digits?
Back
12
4.
FLASHCARD QUESTION
Front
What is the formula for permutations of n objects taken r at a time?
Back
The formula is P(n, r) = n! / (n - r)!.
5.
FLASHCARD QUESTION
Front
What is the formula for combinations of n objects taken r at a time?
Back
The formula is C(n, r) = n! / [r!(n - r)!].
6.
FLASHCARD QUESTION
Front
If you have 4 framed portraits, how many ways can you arrange them?
Back
24 (This is a permutation problem: 4! = 24).
7.
FLASHCARD QUESTION
Front
In how many different orders can 8 glasses of water be arranged?
Back
8! (Factorial of 8).
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