The average , median and mode are calculated for the list $(3,3,7,10,12)$. If 1 is added to the list which of the following would change? <br> I) The average <br> II) The median<br>III) The mode

Question

$\begin{array}{1 1} (a)\;None\\ (b)\;I\;only \\ (c)\;I \;and\;II \\(d)\;I,II and III \end{array}$