Probability: Permutations & Combinations

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What is a permutation?

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Front

What is a combination?

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Front

What is the difference between permutations and combinations?

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Permutations consider the order of selection, while combinations do not. For example, selecting A, B, C is different in permutations (ABC, ACB, etc.) but the same in combinations (ABC).

Front

How do you calculate the number of ways to choose r items from n items?

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Front

What is the factorial of a number?

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Front

How many ways can you arrange 3 books out of 5?

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Front

If you have 10 different shirts, how many ways can you choose 4 shirts?

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Front

What is the r value in permutations?

Back

The r value in permutations represents the number of items being selected from a larger set.

Front

How many different license plates can be made with 6 characters (letters and numbers) without repetition?

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How many ways can you choose 3 different kinds of cookies from 12 kinds?

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