can someone please help me understand this question?
Thank You :-)
A certain preparation consists of liquids x, y, and z in the proportion 5:2:1. How many gallons of the preparation can be made from a stock of materials consisting of 25 gallons of x, 20 gallons of y, and 8 gallons of z?
A. 25
B. 40
C. 80
D. 53
E. 50