A continuous random variable XXX has PDF f(x)=12f(x) = \frac{1}{2}f(x)=21 for 0≤x≤20 \le x \le 20≤x≤2. What is P(X<0.5)P(X < 0.5)P(X<0.5)?
0.25
0.5
0.125
1