\[^{n}{{C}_{r}}+{{2}^{n}}{{C}_{r-1}}{{+}^{n}}{{C}_{r-2}}=\] – McqOptions

MCQOPTIONS

1.	\[^{n}{{C}_{r}}+{{2}^{n}}{{C}_{r-1}}{{+}^{n}}{{C}_{r-2}}=\]
A.	\[^{n+1}{{C}_{r}}\]
B.	\[^{n+1}{{C}_{r+1}}\]
C.	\[^{n+2}{{C}_{r}}\]
D.	\[^{n+2}{{C}_{r+1}}\]
Answer» D. \[^{n+2}{{C}_{r+1}}\]

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