Respuesta :

BiggestBoyBrain
With there being 6 residents per floor, there would be 18 residents on 3 floors.

72/12=6.

18/3= 3 floors.


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Answer: D. 3

Step-by-step explanation:

Let's make a proportion:

72  residents  - 12 floors

18  residents  -  х floors

Hence,

[tex]\displaystyle\\x=\frac{18*12}{72} \\\\x=\frac{18*4*3}{18*4} \\\\x=3\ floors[/tex]

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