Thus, it is the responsibility of the student to speak to the instructor about each absence from class. This should be done as soon as possible, and if at all possible before the absence occurs. Students who miss class are held responsible for all of the material covered, assigned, and collected during their absence. An Introduction is by Samuel Goldberg. One example of a set is the collection of all red playing cards from a single full deck.
Sets are useful for thinking about games and strategies in precise ways.
The probability of an event happening is a mathematical way of defining the likelihood of the event happening. The sample space is simply a set of all the possible things that can happen. For example, suppose a coin is tossed twice. This chapter is dedicated to finding probabilities of given events when the number of possibilities is large. This technique is needed as games become more complicated.