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Combinatorics
medium
0:00.0
What is the coefficient of
x
5
x^5
x
5
in
(
1
+
x
)
10
(1+x)^{10}
(
1
+
x
)
10
?
A
252
252
252
B
210
210
210
C
126
126
126
D
210
210
210
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