A Sample of 500 People Aged 30 - 40 Years

A sample of 500 people aged 30 - 40 years old were interviewed to study the relationship between whether a person graduated from college or only high school and whether s/he changed jobs in the last 5 years.The results are found in the contingency table below.
Answers below have been rounded to two decimal places.
What is the probability that an individual has graduated from college?

A) .36
B) .49
C) .51
D) .64

Correct Answer:

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