In a recent survey, the following data were obtained in response to the question, If the number

Question:

In a recent survey, the following data were obtained in response to the question, €œIf the
number of summer classes were increased, would you be more likely to enroll in one or more of them?€

If a student is selected at random, find the probability that the student
a. Has no opinion
b. Is a freshman or is against the issue
c. Is a sophomore and favors the issue