Six quarts of a 20% solution of alcohol in water are mixed with 4 quarts of a 60% solution of alcohol in water. The alcoholic strength of the mixture is.

Question

A. 80%
B. 50%
C. 36%
D. None

I HAVE NO IDEA HOW TO DO IT PLEASE HELP

Answer 1

.2*6+.6*4=A*10
solve for A