If \[^{n}{{C}_{r}}=84,{{\ }^{n}}{{C}_{r-1}}=36\] and \[^{n}{{C}_{r+1}}=126\], then \[n\] equals [RPET 1997; MP PET 2001]

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

1.	If \[^{n}{{C}_{r}}=84,{{\ }^{n}}{{C}_{r-1}}=36\] and \[^{n}{{C}_{r+1}}=126\], then \[n\] equals [RPET 1997; MP PET 2001]
A.	8
B.	9
C.	10
D.	5
Answer» C. 10

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If \[^{n}{{C}_{r}}=84,{{\ }^{n}}{{C}_{r-1}}=36\] and \[^{n}{{C}_{r+1}}=126\], then \[n\] equals [RPET 1997; MP PET 2001]

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