To determine the extremes of a given proportion, we need to identify the first and the last terms in the proportion.
Given the proportion:
[tex]\[
\frac{4}{7} = \frac{20}{35}
\][/tex]
Let's break it down:
- The first term (numerator of the first fraction) is 4.
- The last term (denominator of the second fraction) is 35.
Therefore, the numbers that are the extremes in this proportion are 4 and 35.
Hence, the correct answer is:
C. 4 and 35