1. a group of students were asked if they carry a credit card. the responses are listed in the table.

class

credit card carrier

not a credit card carrier

total

freshman

11

49

60

sophomore

6

34

40

total

17

83

100

a) if a student is selected at random, find the probability that he or she owns a credit card given that the student is a sophomore. round your answer to three decimal places.
b) if a student is selected at random, find the probability that he or she owns a credit card or that the student is a sophomore. round your answer to three decimal places.