Free Practice Question
PS · Problem Solving
705-805
Combinations
A code consists of either a single letter or a pair distinct letters in alphabetical order to identify each participant. What is the least number of letters that can be used if there are 12 participants and each participant is to receive a different code?
Answer Choices
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3
B
4
C
5
D
6
E
7
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Explanation
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Difficulty
705-805
Type
PS
Category