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tresset_1 [31]
3 years ago
6

there are 21 people at Thanksgiving dinner , if each person hugs everyone else only once , how many hugs take place at the party

?
Mathematics
2 answers:
pav-90 [236]3 years ago
8 0

There are 21 people, everyone hugs each other, but the person hugging cant hug themself, so (21*21)-21

(21*21) -21 = 441

441-21=420

All credit to sulgeorge

Salsk061 [2.6K]3 years ago
4 0

There are 21 people, everyone hugs each other, but the person hugging cant hug themself, so (21*21)-21

(21*21) -21 = 441

441-21=420

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