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18 votes
18 votes
Grace is making lemonade. The directions say to mix 7 cups of water with 3 scops of powdered lemonade mix. How many cups of water should she use with 6 scoops of lemonade mix?A) 7B) 10C) 14D) 20

User Arvind Maurya
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1 Answer

27 votes
27 votes

To solve the exercise, we can use a rule of three, like this:


\begin{gathered} 7\text{ cups of water }\rightarrow3\text{ scoops of powdered lemonade mix} \\ x\text{ cups of water }\rightarrow6\text{ scoops of powdered lemonade mix} \end{gathered}
\begin{gathered} x=\frac{7\text{ cups of water}\cdot6\text{ scoops of powdered lemonade mix}}{3\text{ scoops of powdered lemonade mix}} \\ x=\frac{7\text{ cups of water}\cdot6}{3} \\ x=(7\cdot6)/(3)\text{ cups of water} \\ x=(42)/(3)\text{ cups of water} \\ x=14\text{ cups of water} \end{gathered}

Thus, she should use 14 cups of water with 6 scoops of lemonade mix.

User Gombat
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