tankddd
21.02.2021 •
Mathematics
How many different ways are there to select a group of 7 out of 9 people for a committee in which there are 7 distinct roles?
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Ответ:
P(9,7) = 181440
Step-by-step explanation:
The roles are distinct so order matters. So we must use the permutation formula.
P(n,r)=n!/(n−r)!
P(9,7) = 9! / 2! = 9*8*7*6*5*4*3 = 181440
Ответ:
all angles are equal
Step-by-step explanation:
6x+4= 8x-4
8=2x
4=x
6(4)+4=8(4)-4
28 degrees is equal to 28 degrees
Angles ABC=56