A store manager gathers some demographic information from the store's customers. The following chart summarizes the age-related information they collected: Number of Customers Age 60 62 One customer...

Extracted text: A store manager gathers some demographic information from the store's customers. The following chart summarizes the age-related information they collected: Number of Customers Age < 20="" 97="" 20-29="" 57="" 30-39="" 81="" 40-49="" 66="" 50-59="" 69=""> 60 62 One customer is chosen at random for a prize giveaway. (Round answers to 4 decimal places.) a. What is the probability that the customer is at least 30 but no older than 59? b. What is the probability that the customer is either older than 39 or younger than 20? c. What is the probability that the customer is at least 50?