Answer :

To determine the means of the given proportion [tex]\(\frac{2}{3} = \frac{20}{30}\)[/tex], let's first recall what means are in the context of proportions.

In a proportion of the form [tex]\(\frac{a}{b} = \frac{c}{d}\)[/tex], the numbers [tex]\(b\)[/tex] and [tex]\(c\)[/tex] are called the means, while [tex]\(a\)[/tex] and [tex]\(d\)[/tex] are called the extremes.

Given proportion:
[tex]\[ \frac{2}{3} = \frac{20}{30} \][/tex]

Here, [tex]\(\frac{2}{3} = \frac{20}{30}\)[/tex] can be written in the form [tex]\(\frac{a}{b} = \frac{c}{d}\)[/tex]:

- [tex]\(a = 2\)[/tex]
- [tex]\(b = 3\)[/tex]
- [tex]\(c = 20\)[/tex]
- [tex]\(d = 30\)[/tex]

According to the definition, the means are the middle terms when the proportion is written as:
[tex]\[ 2 : 3 = 20 : 30 \][/tex]

Therefore:
- [tex]\(b = 3\)[/tex] is one of the means.
- [tex]\(c = 20\)[/tex] is the other mean.

So, the numbers that are the means in this proportion are [tex]\(3\)[/tex] and [tex]\(20\)[/tex].

Thus, the correct answer is:
D. 3 and 20