Question

The heights (in $cm$) of $8$ girls of a class are $140,142,135,133,137,150,148$ and $138$ respectively. Find the mean height of these girls.

• A. $137.375$
• B. $139.375$
• C. $140.375$
• D. $143.375$

Answer 1

Answer: (C)

$140.375$

Mean is the average of the values of the data set.

Given the height of the girls are $140,142,135,133,137,150,148,138$

The total number of girls is $8$

Therefore, $\text{mean}=\frac{140+142+135+133+137+150+148+138}{8}$

$⟹\text{mean}=\frac{1123}{8}=140.375$