Answer:
[tex]P(Red) = \frac{3}{20}[/tex]
Step-by-step explanation:
Given
[tex]Red = 3[/tex]
[tex]Trials = 20[/tex]
Required
Determine the experimental probability of next marble being red
This is calculated as:
[tex]P(Red) = \frac{n(Red)}{Trials}[/tex]
Substitute values for n(Red) and Trials
[tex]P(Red) = \frac{3}{20}[/tex]