What is a combination?
11.1 Counting Techniques

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•
Mathematics
•
9th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A selection of items from a larger set where the order does not matter.
2.
FLASHCARD QUESTION
Front
What is a permutation?
Back
An arrangement of items from a larger set where the order does matter.
3.
FLASHCARD QUESTION
Front
How do you calculate combinations?
Back
C(n, r) = n! / (r!(n - r)!) where n is the total number of items and r is the number of items to choose.
4.
FLASHCARD QUESTION
Front
How do you calculate permutations?
Back
P(n, r) = n! / (n - r)! where n is the total number of items and r is the number of items to arrange.
5.
FLASHCARD QUESTION
Front
What is the fundamental counting principle?
Back
If one event can occur in m ways and a second can occur independently in n ways, then the two events can occur in m × n ways.
6.
FLASHCARD QUESTION
Front
If a team of 17 volleyball players needs to choose 3 players, how many different ways can they be chosen?
Back
680
7.
FLASHCARD QUESTION
Front
What is the total number of outcomes when tossing a coin and a number cube (1-6)?
Back
12
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