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AlekseyPX
3 years ago
13

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 sta

rts, how many times would one hear the word "hi"?
Mathematics
1 answer:
Xelga [282]3 years ago
6 0
72 times, I believe. Hope I helped.
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