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Quantitative Aptitude
Remainder Theorem
If n C12= n C...
Question
If
n
C
12
=
n
C
8
, then n =
(a) 20
(b) 12
(c) 6
(d) 30
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Solution
(a) 20
n
=
12
+
8
=
20
[∵
n
C
x
=
n
C
y
⇒
n
=
x
+
y
or
x
=
y
]
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