Question

Different types of toys are listed with their prices.The mean of the given data is 18. Find the value of x.

• A. 20
• B. 18
• C. 12
• D. 22

Answer 1

The correct option is A 20

The given data set is

14, 18, 16, 22, x

It is given that the mean of the data is 18

Mean = $\frac{sumofalldata}{numberofdata}$

Mean= $\frac{14+18+16+22+x}{5}$

= $\frac{70+x}{5}$

Mean = 18

$⟹$ 18 = $\frac{70+x}{5}$

$⟹$ 70+x = 5 $\times$18

$⟹$ x = 90 - 70

$⟹$ x = 20.

Hence, the value of x is 20