If radio station call letters must begin with either K or W and must include either two or three additional letters, how many different possibilities are there? There are different possibilities. (Simplify your answer.)

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Counting Principles

In statistics, the counting principle can be said to be the concept in which the quantity of an item is determined. There can be a single item, or a group of items, or items that are related to each other. In every possible set of items, the quantity of the possible item groups or their sorting measures can be determined with counting principles.