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Ex 3.1,1 es, , Find the range of heights of any ten students of your class., , Let heights of 10 students be, , 120 cm, 125 cm, 150 cm, 110 cm, 148 cm, 143 cm, 105 cm, 149, , cm, 130 cm, 115 cm, , Range = Maximum height — Minimum height, , = 150-105, 410, =45cm 180, —105
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Ex 3.1, 2, Organise the following marks in a class assessment, in a tabular, , form:-4,6, 7, 5,3,5,4,5,2,6,2,5,41,9, 6, 5, 8, 4,6, 7, , Here, we write numbers in tabular form, , , , 1 1, 2 | 2, 3 al), 4 || 3, 5 he 5, 6 I 4, Z | 2, 8, , 9
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Marks Tally Marks ieee ala, , tL al, 2 | 2, 3 il, 4 l| 3, 5 ae g, : I | 4, 7 | 2, 8 1, 9 a, , , , (i) Which number is the highest?, , Height number = 9, , (ii) Which number is the lowest?, , Lowest number = 1
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Marks BELA Ec are taal, , , , 1 1, 2 | 2, 3 1, 4 || 3, 5 NY 5, : II 4, 7 | 2, 8 1, 9 il, , (iii) What is the range of the data?, , Range = Highest number — Lowest number