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KEAM 2020 Math Paper
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© examsnet.com
Question : 27
Total: 120
If
n
P
r
=
840
and
n
C
r
=
35
,
then the value of
r
is equal to
2
4
6
3
5
Validate
Solution:
n
P
r
n
C
r
=
840
35
r
0
′
=
24
r
=
4
© examsnet.com
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