Question

The number of kids and adults who participated in the outdoor games is given.


Which of the following is true about the mean of the two data?

• A. Mean of both data are same.
• B. Mean of data 1(kids) > Mean of data 2 (adults)
• C. Mean of data 1(kids) < Mean of data 2 (adults)
• D. Mean of data 1 is twice that of mean of data2.

Answer 1

The correct option is A Mean of both data are same.

The given dot plot is,

$\text{Mean}=\frac{\text{Sum of all data}}{\text{Number of data}}$

For data 1 (kids):

Mean = $\frac{40+40+50+60+60+70+70+80+80+90}{10}$

= $\frac{640}{10}$

= 64

For data2 (adults):

Mean = $\frac{40+50+50+60+60+60+70+80+80+90}{10}$

= $\frac{640}{10}$

= 64

Hence, the mean of the two data are the same.