Solution for QID #23918: A store gathers some demographic information from their cust | StudyHelpMe

A store gathers some demographic information from their customers. The following chart summarizes the age-related information they collected: Number of Customers c 20 20-30 30-40 89 82 76 69 97 40-50 50-60 60 One customer is chosen at random for a prize giveaway. What is the probability that the customer is at least 20 but no older than 40? What is the probability that the customer is either older than 60 or younger than 30? What is the probability that the customer is at least 60?