# The heights of 10 girls are measure in cms and the results are as follows:

143, 148, 135, 150, 128, 139, 149, 146, 151, 132.

The mean height of girls is

(a) 141.1 cm

(b) 142.1 cm

(c) 143.1 cm

(d) 140.2 cm

**Answer: (b) 142.1 cm **

**Solution:-**

The heights of 10 girls are measure in cms = 143, 148, 135, 150, 128, 139, 149, 146 151, 132

Then, the total sum of their ages = 143 + 148 + 135 + 150 + 128 + 139 + 149 + 146 + 151 + 132

= 1421

So, the mean height of the girls = 1421/10

= 142.1 cm

Hence, the correct answer is option (b) 142.1 cm.