Let Us Try Direction: Classify each random variable as discrete or continuous. 1. The number of arrivals at an emergency room between midnight and 6:00a.m. 2. The weight of a sack of rice labeled "50 kilograms." 3. The duration of the next outgoing telephone call from a business office, 4. The number of kernels of popcorn in a five-kilo container, 5. The number of applicants for a job.