Education A school system compiled the following information from a survey it sent to people who were juniors 10 years earlier.
What is the probability that a person from the junior class 10 years ago graduated from high school and is happy with his or her present job?
What are the branches at each point?
The tree first branches at “graduated” and “not graduated.” Each of these branches at “happy” and “not happy.”
Make a tree diagram to help organize the information.
Let G = graduated, NG = not graduated, H = happy with present job, and NH = not happy with present job.
Which path should you follow?
Follow the path that represents graduates who are happy with their present job.
The blue highlighted path represents P(G and H).
The probability that a person from the junior class 10 years ago graduated and is happy with his or her present job is 0.765, or 76.5%.