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

Anurag Mishra Professor Asked on 3rd February 2016 in Maths.
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1 Answer(s)

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. 

Anurag Mishra Professor Answered on 5th February 2016.
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