Question

Question 9(v)
The height of 10 girls were measured in cm and the results are as follows:
135, 150, 139, 128, 151, 132, 146, 149, 143,141
How many girls have heights more than the mean height?

Answer 1

Mean height of 10 girls

$=\frac{135+150+139+128+151+132+146+149+143+141}{10}$

$=\frac{1424}{10}$

$=142.4cm$

Therefore thare are five girls (with heights 150 cm, 151 cm, 146 cm, 149 cm, 143 cm ), whose height is more than the mean height of 142.4 cm.