Find the mean of the values $0, 1, 2, \dots, n$ with respective weights $^nC_0, ^nC_1, ^nC_2, \dots, ^nC_n$.

  • A
    $\frac{2^n}{n+1}$
  • B
    $\frac{n+1}{2}$
  • C
    $\frac{2^{n+1}}{n(n+1)}$
  • D
    $\frac{n}{2}$

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