Giraffes to monkeys

The ratio of the number of giraffes to the number of monkeys in a zoo is 2 to 5. Which statement about the giraffes and monkeys could be true?

A. For every 10 monkeys in the zoo, there are 4 giraffes.
B. For every giraffe in the zoo, there are three monkeys.
C. For every six monkeys in the zoo, there are 15 giraffes.
D. For every five giraffes in the zoo, there are eight monkeys.

Correct answer:

x = A

Step-by-step explanation:

$$\begin{gathered} r=2:5=0.4 \\ A=4:10=0.4=2:5 \\ B=1:3\doteq 0.3333=1:3 \\ C=15:6=2.5=5:2 \\ D=5:8=0.625 \\ r=A \\ x=A \end{gathered}$$

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