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Graph Theory
hard
0:00.0
What is the degree of a vertex in
K
n
K_n
K
n
?
A
n
n
n
B
n
−
1
n-1
n
−
1
C
n
(
n
−
1
)
/
2
n(n-1)/2
n
(
n
−
1
)
/2
D
1
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