OpenStax, Contemporary Mathematics §1.2 Subsets · Example 6 · Combinatorics · Sets & logic
Subsets · Example 6
A fast-food restaurant offers a deal where you can select two options from the following set of four menu items for $6: a chicken sandwich, a fish sandwich, a cheeseburger, or 10 chicken nuggets. Javier and his friend Michael are each purchasing lunch using this deal. Create two equivalent, but not equal, subsets that Javier and Michael could choose to have for lunch.
OpenStax, Contemporary Mathematics · §1.2 Subsets · Example 6
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