The Number of Cartoons Watched on Saturday Mornings by Students $g$

Multiple Choice

The number of cartoons watched on Saturday mornings by students in Mrs. Kelly's first $g$ | class is shown below.
$\begin{array} { l l l l l l l } \text { Number of cartoons watched } \boldsymbol { X } & 0 & 1 & 2 & 3 & 4 & 5 \\ \text { Probability } \boldsymbol { P } ( \boldsymbol { X } ) & 0.15 & 0.20 & 0.30 & 0.10 & 0.20 & 0.05 \end{array}$
Give the standard deviation for the probability distribution. de

A) 1.46
B) 1.89
C) 1.18
D) 2.25