Answer:
120 reptiles
Explanation:
The ratio of mammals to reptiles = 3: 5
Number of mammals =72
Let the number of reptiles = x
We therefore have that:
[tex]\frac{3}{5}=\frac{72}{x}[/tex]We solve the equation above for x.
[tex]\begin{gathered} 3\times x=72\times5 \\ x=\frac{72\times5}{3} \\ x=120 \end{gathered}[/tex]There are 120 reptiles in the zoo.
