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Question
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 ______.
Options
0.5
0.6
0.7
0.8
Solution
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 0.8.
Explanation:
The total number of people in sample study, n(S) = 642.
The number of people who have high school certificate, n(E) = 514.
So, the probability that the person selected has a high school certificate
= `(n(E))/(n(S))`
= `514/642`
= 0.8
Hence, the probability that the person has a high school certificate is 0.8.
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