Answer :
Given:
The numbers written on ping-pong balls are 1 to 20, N = 20.
The objective is to find the probability of drawing a number that is evenly distributed by 5.
The numbers divisible by 5 in 1 to 20 is, 5, 10, 15 and 20.
[tex]n(E)=4[/tex]Then, the required probability can be calculated as,
[tex]\begin{gathered} P(E)=\frac{n(E)}{N} \\ =\frac{4}{20} \\ =0.8 \\ =80\text{ percentage.} \end{gathered}[/tex]Hence, the probability of drawing a number that is evenly distributed by 5 is 20 percentage.