Q.1 A customer-service supervisor regularly conducts a survey of customer satisfaction. The results of the latest survey indicate that 8 % of customers were not satisfied with the service they received at their last visit to the store. Of those who are not satisfied, only 22 % return to the store within a year. Of those who are satisfied, 64 % return within a year. A customer has just entered the store. In response to your question, he informs you that it is less than one year since his last visit to the store. What is the probability that he was satisfied with the service he received?