In Testing a Hybrid Engine, Various Mixtures of Gasoline and Methanol

Multiple Choice

In testing a hybrid engine, various mixtures of gasoline and methanol are being tried. How much of a 95%-gasoline mixture and how much of an 80%-gasoline mixture would be needed to make 600 gal of a 90%-gasoline mixture?

A) 375 gal of the 95%-gasoline mixture,
225 gal of the 80%-gasoline mixture.
B) 190 gal of the 95%-gasoline mixture,
210 gal of the 80%-gasoline mixture.
C) 420 mL of the 95% solution,
180 mL of the 80% solution.
D) 200 gal of the 95%-gasoline mixture,
400 gal of the 80%-gasoline mixture.
E) 400 gal of the 95%-gasoline mixture,
200 gal of the 80%-gasoline mixture.