The ratio of nonwinners in group A to nonwinners in group B after the selections are made is 156 : 319.
Ratio expresses the relationship between two or more numbers. It shows the frequency of the number of times that one value is contained within other value(s).
Nonwinners in group A = (1 - 3/5) x 390 = 156
Winners in group B = (390 - 156) = 234
nonwinners in group B = 553 - 234 = 319
The ratio = 156 : 319
To learn more about ratios, please check: https://brainly.com/question/25927869
#SPJ1