In a group of 700 people, must there be 2 who have the same first and last initials? Why?
Whether there must be 2 people having the same first and last initials, if there are 700 people in a group.
There are 700 people in a group.
The pigeonhole principle states that if objects (e.g. pigeons) are to be distributed in holes then some hole must contain at least two objects (pigeons).
Consider a group of 700 people.
So, take these 700 people as pigeons.
Assume each pair of distinct letters formed out of 26 alphabets is a pigeon holes.
There are 26 alphabets.
The first letter can be chosen in 26 ways and the second letter can be chosen in 26 ways as letters in the pair are same
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