Question

80 students from a university were interviewed at the Student Center and asked if they were in favor of separating a smoking area. The survey are:

There are 50 freshmen, 30 are not freshmen.
There are 38 students in favor, 32 against and 10 who did not comment.
Of those in favor, 15 are first-year and 23 are not first-year.
Of those who are against, 27 are first-year and 5 are not first-year.

Of those who did not comment, 8 are first-year and 2 are not first-year.

Be the events:
Let A: The freshman
Let B: THE student who is not a first year
Let C: The student is in favor
Let D: The Student Against
Let E: The Student has no opinion

If a student is randomly selected:
The probability that this is for and against the separation of a smoking area next to the cafeteria is approximately:
a) 0.9125
b) 0.875
c) 0.3375
d) 0

Answer 1