Choose the correct answer.

Sean wants to make a mixture that is 50% lemon juice and 50% lime juice. How much 100% lemon juice should he add to a juice that is 30% lemon juice and 70% lime juice to make 7 gal of the 50% lemon/50% lime juice mixture?

A. 0.5 gal

B. 1 gal

C. 2 gal

D. 2.5 gal

Our total mixture will be 7 gal - of that, we need 3.5 gal of each. Because we already have all the lime juice, there is 3.5 gal of it in the 70 - 30 mixture. 3.5 gallons represents 70%, and therefore means there are 5 gallons in the 70-30. We must add two gallons of lemon to get the total of 7 gallons. 2 gallons will also make the 1.5 gal of lemon (5-3.5) into 3.5