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Sagot :
Answer:
3916 hello's were said
Explanation:
(n/2)(n-1)
insert n = 89
(89/2)(89-1)
(44.5)(88)
3916 hello's
Answer:
3916 hellos
Step-by-step explanation:
That is the number of combinations of 2 from 89
= 89! / (89-2)! 2!
= 89! / 87! 2!
= 89*88 / 2
= 3916.
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