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Graph Theory
medium
0:00.0
How many edges are in a star graph
S
n
S_n
S
n
with
n
n
n
vertices?
A
n
n
n
B
n
−
1
n-1
n
−
1
C
n
+
1
n+1
n
+
1
D
2
n
−
2
2n-2
2
n
−
2
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