Questions: The table shows the educational attainment of the population of a country, ages 25 and over, expressed in millions. Find the probability that a randomly selected person, aged 25 or over, has completed four years of high school only or some college, but less than four years.
Years of High School Years of College
--- --- --- --- ---
Mase Less than 4 4 only Some (less than 4) 4
Female 16 24 24
Total 12 32 19 43
28 56
The probability is .
Transcript text: The table shows the educational attainment of the population of a country, ages 25 and over, expressed in millions. Find the probability that a randomly selected person, aged 25 or over, has completed four years of high school only or some college, but less than four years.
\begin{tabular}{l|c|c|c|c}
\cline { 2 - 4 } & \multicolumn{2}{|c|}{ Years of High School } & \multicolumn{2}{c}{ Years of Collec } \\
\cline { 2 - 5 } Mase & Less than 4 & 4 only & Some (less than 4) & 4 \\
\cline { 2 - 5 } Female & 16 & 24 & 24 & \\
\cline { 2 - 5 } Total & 12 & 32 & 19 & 43 \\
\cline { 2 - 5 } & 28 & 56 &
\end{tabular}
The probability is $\square$ $\square$.
(Type an integer or a simplified fraction.)
Solution
Solution Steps
To find the probability that a randomly selected person, aged 25 or over, has completed four years of high school only or some college but less than four years, we need to calculate the total number of people who fall into these categories and divide it by the total population considered. Specifically, we will sum the number of people who have completed four years of high school only and those who have completed some college (less than four years), and then divide this sum by the total population.
Step 1: Identify Relevant Data
We are given the following data regarding educational attainment for the population aged 25 and over:
Number of people who completed 4 years of high school only: \( 32 \)
Number of people who completed some college (less than 4 years): \( 19 \)
Total population aged 25 and over: \( 84 \) (calculated as \( 28 + 56 \))
Step 2: Calculate the Favorable Outcomes
The total number of people who have completed either 4 years of high school only or some college (less than 4 years) is:
\[
\text{Favorable Outcomes} = 32 + 19 = 51
\]
Step 3: Calculate the Probability
The probability \( P \) that a randomly selected person aged 25 or over falls into the specified categories is given by:
\[
P = \frac{\text{Favorable Outcomes}}{\text{Total Population}} = \frac{51}{84}
\]
Step 4: Simplify the Probability
To simplify \( \frac{51}{84} \), we find the greatest common divisor (GCD) of \( 51 \) and \( 84 \), which is \( 3 \):
\[
\frac{51 \div 3}{84 \div 3} = \frac{17}{28}
\]
Final Answer
The probability that a randomly selected person, aged 25 or over, has completed four years of high school only or some college but less than four years is:
\[
\boxed{\frac{17}{28}}
\]