A group of 10 students get onto a bus for a field trip and put their lunches into a cooler. Later in the day, at lunch time, the class sponsor reaches in, randomly grabs a lunch, and hands it to each student that arrives randomly.
Did anyone get their lunch?
Hint: Suppose there wer three students and three lunches.Generate the different possible combinations of students and lunches.
Dr. Robert Sweetland's Notes ©