Combinations
Flashcard
•
Mathematics
•
9th - 10th Grade
•
Practice Problem
•
Hard
Wayground Content
FREE Resource
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a combination?
Back
A selection of items where the order does not matter.
2.
FLASHCARD QUESTION
Front
What is a permutation?
Back
An arrangement of items where the order does matter.
3.
FLASHCARD QUESTION
Front
When would you use a combination instead of a permutation?
Back
Use a combination when the order of selection is not important.
4.
FLASHCARD QUESTION
Front
When would you use a permutation instead of a combination?
Back
Use a permutation when the order of selection is important.
5.
FLASHCARD QUESTION
Front
How many ways can you choose 3 players from a team of 17?
Back
680 ways (using combinations).
6.
FLASHCARD QUESTION
Front
If you have 5 different books and want to arrange them on a shelf, how many arrangements can you make?
Back
120 arrangements (5! = 5 x 4 x 3 x 2 x 1).
7.
FLASHCARD QUESTION
Front
What is the formula for combinations?
Back
C(n, r) = n! / (r!(n - r)!) where n is the total items and r is the items chosen.
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