Answer:
[tex]\frac{3}{8}[/tex]
Step-by-step explanation:
P (Anna) + P (Irina) + P ( Avel) + P (Vlad) = [tex]1[/tex]
[tex]\frac{1}{8}+\frac{3}{8}[/tex] [tex]+[/tex] P (Avel) [tex]+[/tex] [tex]\frac{1}{8}[/tex] [tex]= 1[/tex]
P (Avel) [tex]= 1 - \frac{1}{8} - \frac{3}{8} - \frac{1}{8}[/tex]
P (Avel) [tex]= \frac{3}{8}[/tex]
The probability that Avel will be driving during any given kilometer is [tex]\frac{3}{8}[/tex].
