A restaurant offers the possibility of 168 three-course dinners. Each dinner has an appetizer, an entrée, and a dessert. If the number of appetizers decreases from 7 to 5, how many fewer possible three-course dinners can the restaurant offers?
1 Answer
Mar 23, 2017
120
Explanation:
Let's look at it this way:
Before the change is made, there are 168 three-course dinners possible. How can we achieve that number? We have Appetizers, Entrees, and Desserts. We can reach 168 by saying:
We know there are 7 appetizers, so
We can now multiply in the new number of appetizers,
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Notice that we could have simply said: