From the given table,
The total number of plumbers = (25 + 20 + 30) = 75 persons
The number of plumbers that is a journey man = 20 persons
[tex]\text{Probability}=\frac{\text{Number of required outcomes}}{The\text{ total number of outcomes}}[/tex][tex]P(\text{that he is a journeyman)=}\frac{\text{Number of plumbers that is a journey man}}{\text{The total number of plumbers}}[/tex][tex]P(\text{that he is a journeyman)}=\frac{20}{75}=\frac{4}{15}[/tex]Hence, the probability that he is a journeyman is 4/15.
Option 3 is the correct answer.
