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Parental pride. The number of pictures you have of your loving parents equals T. You want to choose two to put on prominent display in your dorm room. You consider all your choices and discover there are 21 ways to select two pictures (the order of the pictures doesn’t matter). How many pictures do you have?
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Chapter 8 Solutions
The Heart of Mathematics: An Invitation to Effective Thinking 4e + WileyPLUS Registration Card
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