Answer:
The number line that best represents this statement is:
Option: A
Explanation:
We are given a statement that:
More than 20 students participated in a drawing competition.
This means that when this statement is represented on the number line the region that is covered is:
(20,∞)
Since the more than 20 students means that 20 is not included and all the numbers greater than 20 are included.
Also, on the number line the shaded region lie to the right of 20 and there is a open circle at 20 as 20 is not included in the domain.
Hence, option: A is the correct answer.