DISCUSS: Pair of Initials Explain why in any group of people, at least two people must have the same pair of initials.
The reason that in a group of people, at least two people have the same pair of initials.
The group of people.
The Fundamental Counting Principle: let there be two events in order. If the first event can be in ways and the second event can be in ways then the two events can be in order in ways.
First calculate the all different possible ways to form the pair of initials. As each initial is taken from the English letters, also the pair of initials selected from it.
The first initial pair is selected in different ways, and the second initial pair is selected in different ways
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