Answer:
The ratio of the number of red T-shirt to the number of blue T-shirt is 1:4
Step-by-step explanation:
The ratio is a relation between two elements in this case as it is said that for each red t-shir they should manufacture 4 blue T-shirt the we have a relation
red T-shirt blue T-shirt
1 4
1:4
The ratio of the number of red T-shirt to the number of blue T-shirt is 1:4
This can also be expressed as
[tex]\frac{Red T-shirt}{Blue T-shirt} =\frac{1}{4} \\[/tex]