Answer
Probability that a randomly selected Americans has completed four years of high school only or less than four years of high school = $\frac{85}{174}$
Work Step by Step
Total population or total outcomes = 174
Americans who have completed four years of high school only or less than four years of high school = 56 + 29 = 85
Probability = $\frac{Total outcomes}{favorable outcomes}$
Probability that a randomly selected Americans has completed four years of high school only or less than four years of high school = $\frac{85}{174}$
