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There are nine kids in a class. When any two meet, each says "hi" to the other and the answer "hi" follows. Before the class starts, how many times would one…

There are nine kids in a class. When any two meet, each says "hi" to the other and the answer "hi" follows. Before the class starts, how many times would one…
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There are nine kids in a class. When any two meet, each says "hi" to the other and the answer "hi" follows. Before the class starts, how many times would one hear the word "hi"?

User Fran B
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1 Answer

5 votes
72 times, I believe. Hope I helped.
User Ariel Malka
by
7.5k points
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