Answer:
The probability density function is f(x)=0.125.
Step-by-step explanation:
We have he continuous random variable x, which has a uniform distribution over the interval from 20 to 28. We calculate the probability density function has what value in the interval between 20 and 28.
We use the formula:
[tex]\boxed{f(x)=\frac{1}{b-a}}[/tex]
We have a=20 and b=28, we get
[tex]f(x)=\frac{1}{28-20}\\\\f(x)=\frac{1}{8}\\\\f(x)=0.125\\[/tex]
The probability density function is f(x)=0.125.
