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Combinatorics
easy
0:00.0
If
n
=
5
n = 5
n
=
5
and
r
=
2
r = 2
r
=
2
, what is
(
n
r
)
\binom{n}{r}
(
r
n
)
?
A
5
B
10
C
20
D
25
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