maryam4241
18.07.2019 •
Mathematics
10 points! perform the indicated operation: 2 3/4 - 1/3 =
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Ответ:
Ответ:
Therefore, the number of orders (combinations) of 2 people at a time from 8 is
₈C₂ = 8!/(2!6!)
= (8*7*6!)/(2*6!)
= (8*7)/2
= 56/2
= 28
28