Chapter 3 Counting
One of the first things you learn in mathematics is how to count. Now we want to count large collections of things quickly and precisely. For example:
-
In a group of
people, if everyone shakes hands with everyone else exactly once, how many handshakes take place? -
How many anagrams are there of โanagramโ?
Before tackling questions like these, letโs look at the basics of counting.