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QThe average of the first nine prime numbers is

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  • A 9 ✔ ✖
  • B 11 ✔ ✖
  • C \begin{equation} 11 \frac{1}{9} \end{equation} ✔ ✖
  • D \begin{equation} 11 \frac{2}{9} \end{equation} ✔ ✖
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Explanation

\begin{array}{l} =\frac{2+3+5+7+11+13+17+19+23}{9} \\ =\frac{100}{9} \\ =11 \frac{1}{9} \end{array}
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