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Standard XII
Mathematics
Combination
Question
For
0
≤
r
≤
n
,
n
C
r
=
Open in App
Solution
Verified by Toppr
0
≤
r
≤
n
,
n
C
r
=
n
!
r
!
(
n
−
r
)
!
Hence, the answer is
n
!
r
!
(
n
−
r
)
!
.
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