The unit 5 listening prompt is saying " Rogelio do you have a class right now? yes I do, right now I have science class. Do you want to study after class? Yes, at what time? at 4 in the afternoon. Ok well see you after class.
The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count
