## College Algebra (6th Edition)

$\frac{43}{58}$
We know that $probability=\frac{\text{number of favourable outcomes}}{\text{number of all outcomes}}$ The total population (the number of all outcomes) is $174$ By using the table, the total number of people who have not completed 4 years is the sum of the ones who completed less than 4 years of high school, 4 years of high school only, and some college, which here is $129$ Hence the probability here is: $\frac{129}{174}=\frac{43}{58}$