#### Answer

$\frac{1}{6}$

#### Work Step by Step

P(E) = $\frac{no.\ of\ outcomes\ in\ favor}{Total\ no.\ of\ outcomes}$
We use the data in the table from the textbook to find the probability of a given education level. A total of 174 million people were included in the US Census Bureau study.
E: Had less than four years of high school.
Favorable outcomes= {29}
P(E) = $\frac{29}{174}$ = $\frac{1}{6}$