$$\text { TABLE 3-8 }$$ Given Below Is the Frequency Distribution of the Number of Distribution

Short Answer

$$\text { TABLE 3-8 }$$ Given below is the frequency distribution of the number of defective tomatoes in 50 different shipments.
$$\begin{array} { l l } \hline \text { Defective Items } & \text { Frequency } \\\hline \text { 0 but less than } 5 & 35 \\5 \text { but less than } 10 & 7 \\10 \text { but less than } 15 & 5 \\15 \text { but less than } 20 & 2 \\20 \text { but less than } 25 & 1 \\25 \text { but less than } 30 & 0\end{array}$$
-Referring to Table 3-8, what is the approximate variance?