The following table represents the probability distribution of a random variable $X$ for some $k \in Q$. Find the mean of $X$. \begin{array}{|c|c|c|c|c|c|c|} \hlineX=x & -2 & -1 & 0 & 1 & 2 & 3 \\ \hlineP(X=x) & 0.1 & k & 0.2 & 2 k & 0.3 & k \\ \hline \end{array}

• A

  1.7
• B

  1.8
• Correct answer
  C

  0.8
• D

  0.7

Hence, the correct answer is option: 'C'.