In a sample of 100 people 57 completed only high school 23 w

In a sample of 100 people, 57 completed only high school, 23 went on to complete only some college, 13 went on to complete a two-year or four-year college, and 7 went on to graduate school. What proportion of the sample does not have a two-year or four-year college degree?

a. .07

b. .13

c. .80

d. .87

Solution

P( Only High School) = 0.57
P( Only College) = 0.23
P( 2 Yr or 4 Yr College) = 0.13
P( Graduate school) = 0.07
P( Sample does not have a two-year or four-year college degree) = 100 - ( 2 Yr or 4 Yr College ) - ( Graduate School ) = 1 - 0.13 - 0.07 = 0.80

[ANSWER] c. .80