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Question
Height (in cm) of 7 boys of a locality are 144 cm, 155 cm, 168 cm, 163 cm, 167 cm, 151 cm and 158 cm. Find their mean height.
Solution
Sum of the values = Sum of heights
= 144 cm + 155 cm + 168 cm + 163 cm + 167 cm + 151 cm + 158 cm = 1106 cm and
Number of values = Number of boys = 7
∴ The mean = `"Sum of heights"/"Number of boys" = 1106/7 = 158` cm
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