Question

Question 25
In a sample study of 642 people, it was found that 514 people have a high school certificate. If a person is selected at random, the probability that the person has a high school certificate is:

A) 0.5
B) 0.6
C) 0.7
D) 0.8​​​​​​​

Answer 1

The answer is D.
The total number of people in sample study, n(S) = 642.
The number of people who have the high school certificate, n(E) = 514.
So, the probability that the person selected has a high school certificate
$=\frac{n\left(E\right)}{n\left(S\right)}=\frac{514}{642}=0.8$
Hence, the probability that the person has a high school certificate is 0.8