Irene R. answered 11/14/19
BS in Mechanical Engineering and Certified math teacher for 13 years
This is a mixture question involving ratios. You need to determine which will have the stronger lemon taste. You will use the ratio of scoops to cup and see which ratio is larger.
For Joe's mixture:
5 scoops/2 cups water is equivalent to 2 and 1/2 scoops for 1 cup water.
For Lucy's mixture:
6 scoops for 3 cups water which is equivalent to 2 scoops for 1 cup water.
Therefore Joe's recipe will have a stronger lemon flavor (since 2 and 1/2 is larger than 2).