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Combinatorics
medium
0:00.0
What is the coefficient of
x
3
y
2
x^3 y^2
x
3
y
2
in the expansion of
(
x
+
y
)
5
(x+y)^5
(
x
+
y
)
5
?
A
5
B
10
C
20
D
30
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