Answer
a. $0.121$
b. $0.552$
c. $0.414$
Work Step by Step
Total number is 58
a. Has no opinion (add up to 7)
P(no opinion)=$7/58=0.121$
b. Is a freshman or is against the issue (add up freshman 28, against 12)
P( freshman)=$28/58=0.483$, P(against)=$12/58=0.207$
P(freshman and against)=$8/58=0.138$
P(freshman or against)=$0.483+0.207-0.138=0.552$
c. Is a sophomore and favors the issue
P( sophomore and favors)=$24/58=0.414$
