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JEEMAIN and NEET
>>
Mathematics
>>
Class11
>>
Permutations and Combinations
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Q)
50
C
4
+
6
∑
r
=
1
56
−
r
C
3
=
?
(
A
)
55
C
3
(
B
)
55
C
4
(
C
)
56
C
3
(
D
)
56
C
4
Share
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