Question

The daily low temperatures for a week are shown.

What is the mean low temperature of the week?

• A. $-2^{o}F$
• B. $6^{o}F$
• C. $8^{o}F$
• D. ${10}^{o}F$

Answer 1

The correct option is B

$6^{o}F$

From the figure,

The list of low temperatures are $-2^{o}F,-3^{o}F,-1^{o}F,8^{o}F,{10}^{o}F,{12}^{o}F,{18}^{o}F$

The mean temperature of the week $\mathit{=}\frac{\mathit{S}\mathit{u}\mathit{m}\mathit{}\mathit{o}\mathit{f}\mathit{}\mathit{t}\mathit{h}\mathit{e}\mathit{}\mathit{o}\mathit{b}\mathit{s}\mathit{e}\mathit{r}\mathit{v}\mathit{a}\mathit{t}\mathit{i}\mathit{o}\mathit{n}}{\mathit{N}\mathit{u}\mathit{m}\mathit{b}\mathit{e}\mathit{r}\mathit{}\mathit{o}\mathit{f}\mathit{}\mathit{o}\mathit{b}\mathit{s}\mathit{e}\mathit{r}\mathit{v}\mathit{a}\mathit{t}\mathit{i}\mathit{o}\mathit{n}}$

$$\begin{gathered} =\frac{(-2-3-1+8+10+12+18)}{7} \\ =\frac{(-6+48)}{7} \\ =\frac{42}{7} \\ =6^{o}F \end{gathered}$$

The mean low temperature of the week is $6^{o}F$

Hence, the correct answer is option (B).