skim2004sk skim2004sk

20-05-2018
Mathematics

contestada

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"?

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dasiajohnson121 dasiajohnson121

20-05-2018

72 times, I believe. Hope I helped.

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