Answer:
7 : 11
Step-by-step explanation:
x represents red, y represents green.
Based on the given information;
x + y = 55
There are 20 M&Ms that are green, hence;
y = 20
Substituting this back into the first equation;
x + y = 55
x + 20 = 55
x = 35
The ratio of red : total would then be;
35 : 55
Divide both sides by 5
7 : 11