Please help me with this question

Question

1522 customers at a major retailer were surveyed whether or not they made a purchase and were satisfied with the service they received. The table below organizes the responses.

satisfied with service not satisfied with services total

Made a purchase 130 494 624

Did not make a purchase 715 183 898

Total 845 677 1522

a. [2 pts] What is the probability that a shopper selected at random made a purchase, given that they were not satisfied with the service? Write your answer as a fraction.

b. [2 pts] What is the probability that a shopper selected at random was not satisfied with the service, given that they made a purchase? Write your answer as a fraction.

Answer 1

a) a total of 677 were not satisfied. Of these 494 made a purchase 494/677

b) a total of 624 made a purchase. Of these 494 were not satisfied 494/624