Trying to understand what equation approach to take with the below. e time it takes to serve a guest at a restaurant (from the time the guest is seated until the guest leaves the table) is exponentially distributed, with the average time being 70 minutes. If the average is 70 mins what the probability that the guess spends less than 50 mins at that table? 80 mins at the table? and somewhere between 45 to 70 mins at the table