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Published byGyula Fazekas Modified over 5 years ago
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Warm Up Melanie is choosing an outfit for a job interview. She has four dresses, three blouses, five pairs of pants and three pairs of shoes to choose from. How many possible outfits can Melanie wear?
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Today, we are going to talk about COMBINATIONS!!
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Combinations Order does not matter
The number of combinations of r selected items from a set of n items at a time is: C = N- how many options you have R- how many you want to pick
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Example 1 There are seven books on your summer reading list.
How many ways can you choose five books to read?
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Example 2 A magazine company has 20 subscriptions to choose from.
In how many ways can you order 4 magazines?
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Your Turn! Of the 20 books on your reading list, in how many ways can you choose 7 books? In how many ways can 3 pizza toppings be chosen from 12 available toppings? In how many ways can 7 students from a class of 30 be chosen for a field trip?
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