Riverrun campground has sites for people to use for camping. The site can be reserved for a certain number of days. To help the cleaning and maintenance, the campground request an exit time (The time at which campers leave the site) of 9 A. M. on the last day of the reservation. To estimate the typical exit time, the manager of Riverrun select a random number of 60 sites. Of the 60 sides, 40 were reserved by people without young children and 20 were reserved by people with young children. The following histograms summarize the exit times, recorded as minutes relative to 9 AM. For example an exit time of 9:30 AM is 30 minutes relative to the exit time of 9 AM. Each interval contains possible values from the left endpoint up to but not including the right endpoint.