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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"?

asked
User Fran B
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8.0k points

1 Answer

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