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Q.1 Find the range of heights of any ten students of your class.
Answer :

Let us have the heights of 10 students are as follows:
139 cm, 140.5 cm, 138 cm, 135.3 cm, 162 cm, 138 cm, 140.5 cm, 135.5 cm, 160 cm, 158 cm
Here, minimum height = 135.3 cm Maximum height =162 cm Therefore Range = Maximum height – Minimum height = 162 cm — 135.3 cm = 26.7 cm Hence, the required range = 26.7 cm.