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Frequency Distribution

The Heights i...

Question

The Heights ( in cm ) of 10 girls of a class are 140 , 142, 135 , 133 , 137 , 150 , 148 and 138, 141, 139 respectively. Find the mean height of these girls

A

140.3 cm

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B

140

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C

141

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D

141.3

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Solution

The correct option is A
140.3 cm

The Number of observations = 10

Sum of the observations = 140 + 142 + 135 + 133 + 137 + 150 + 148 + 138 + 141 + 139 = 1403

Mean = $\frac{S u m o f t h e o b s e r v a t i o n s}{T o t a l n u m b e r o f o b s e r v a t i o n s}$

= $\frac{1403}{10}$

= 140.3 cm

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