If \[^{n}{{C}_{r-1}}=36,{{\ }^{n}}{{C}_{r}}=84\] and \[^{n}{{C}_{r+1}}=126\], then the value of \[r\] is [IIT 1979; Pb. CET 1993, 2003; DCE 1999, 2000; MP PET 2001]

If \[^{n}{{C}_{r-1}}=36,{{\ }^{n}}{{C}_{r}}=84\] and \[^{n}{{C}_{r

1.	If \[^{n}{{C}_{r-1}}=36,{{\ }^{n}}{{C}_{r}}=84\] and \[^{n}{{C}_{r+1}}=126\], then the value of \[r\] is [IIT 1979; Pb. CET 1993, 2003; DCE 1999, 2000; MP PET 2001]
A.	1
B.	2
C.	3
D.	None of these
Answer» D. None of these

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If \[^{n}{{C}_{r-1}}=36,{{\ }^{n}}{{C}_{r}}=84\] and \[^{n}{{C}_{r+1}}=126\], then the value of \[r\] is [IIT 1979; Pb. CET 1993, 2003; DCE 1999, 2000; MP PET 2001]

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