Two thousand randomly selected adults were asked if they think they are financially better off than their parents. The following table gives the two-way classification of the responses based on the education levels of the persons included in the survey and whether they are financially better off, the same as, or worse off than their parents.

Suppose one adult is selected at random from these 2000 adults. Find the following probabilities.
a. P(better off or high school)
b. P(more than high school or worse off )
c. P(better off or worse off )

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Better off Same as Worse off Less Than High School 140 60 200 High School 450 250 300 More Than High School 420 110 70