If \[n\] and \[r\] are two positive integers such that \[n\ge r,\] then \[^{n}{{C}_{r-1}}\]\[+{{\,}^{n}}{{C}_{r}}=\] [Kerala (Engg.) 2002]

If \[n\] and \[r\] are two positive integers such that \[n\ge r,\] the

1.	If \[n\] and \[r\] are two positive integers such that \[n\ge r,\] then \[^{n}{{C}_{r-1}}\]\[+{{\,}^{n}}{{C}_{r}}=\] [Kerala (Engg.) 2002]
A.	\[^{n}{{C}_{n-r}}\]
B.	\[^{n}{{C}_{r}}\]
C.	\[^{n-1}{{C}_{r}}\]
D.	\[^{n+1}{{C}_{r}}\]
Answer» E.

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If \[n\] and \[r\] are two positive integers such that \[n\ge r,\] then \[^{n}{{C}_{r-1}}\]\[+{{\,}^{n}}{{C}_{r}}=\] [Kerala (Engg.) 2002]

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