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3 cards from this section. Quick, good the night before a test.
What is the number of permutations of 2 elements from {A, B, C}?
Think about ordering the selections.
What defines a combination?
Remember the order doesn't matter.
What is a permutation?
Think about how selections are rearranged.
True or False: In combinations, the order of selection matters.
Consider how choices are grouped.
If you have 7 different colored beads, how many ways can you arrange 4 of them in a row?
Use the permutations formula.
How many ways can you select 5 items out of 10 items where the order does not matter?
Apply the combinations formula accordingly.
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