To find the probability that a randomly selected citizen, aged 25 or over, had 4 years of high school only, we can follow these steps:
1. Identify the total population aged 25 and over:
From the table, the total population aged 25 and over is given in the "Total" column and row, which is 157 (millions).
2. Identify the population with 4 years of high school only:
This value is found in the column labeled "4 Years High School Only" and row "Total," which is 51 (millions).
3. Calculate the probability:
Probability is calculated by dividing the number of favorable outcomes by the total number of outcomes. In this context, the favorable outcome is the population with 4 years of high school only (51 millions), and the total number of outcomes is the total population aged 25 and over (157 millions).
[tex]\[
\text{Probability} = \frac{\text{Population with 4 Years of High School Only}}{\text{Total Population Aged 25 and Over}} = \frac{51}{157}
\][/tex]
4. Simplify the fraction, if possible:
In this case, the fraction [tex]\(\frac{51}{157}\)[/tex] is already in its simplest form.
Therefore, the probability that a randomly selected citizen, aged 25 or over, had 4 years of high school only is [tex]\(\frac{51}{157}\)[/tex].
