The A.M. of \( { }^{n} C_{o},{ }^{n} C_{1},{ }^{n} C_{2}, \ldots \ldots,{ }^{n} C_{n} \), is :
(...
The A.M. of \( { }^{n} C_{o},{ }^{n} C_{1},{ }^{n} C_{2}, \ldots \ldots,{ }^{n} C_{n} \), is :
(A) \( \frac{2^{n}}{n+1} \)
(B) \( \frac{2^{n}}{n} \)
(C) \( \frac{2^{n-1}}{n+1} \)
(D) none of these
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