Answer: Option D.
Step-by-step explanation:
By definition, Ratios are used to compare values.
There are different forms to express ratios:
1. Expressed in words:
[tex]a\ to\ b[/tex]
2. In odds notation:
[tex]a:b[/tex]
3. In fractional notation:
[tex]\frac{a}{b}[/tex]
In which "a" is the numerator and "b" is the denominator.
In this case you need to compare the number of apartments and the number of bathrooms in a building.
According to the information given in the exercise, you know that the building has 45 apartments and 50 bathrooms.
Then, you can determine that the ratio of apartments to bathrooms in that building is:
[tex]45:50[/tex]
The next step is to smplify it. Therefore, you get:
[tex]9:10[/tex]
