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  1. Chapter 3 Class 7 Data Handling
  2. Serial order wise
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Ex 3.1, 3 Find the mean of the first five whole numbers Whole numbers are numbers starting from 0 Like 0, 1, 2, 3, 4, 5, 6, 7, 8, …… First 5 whole numbers = 0, 1, 2, 3, 4 Mean of first 5 whole numbers = (π‘†π‘’π‘š π‘œπ‘“ π‘œπ‘π‘ π‘’π‘Ÿπ‘£π‘Žπ‘‘π‘–π‘œπ‘›)/(π‘π‘’π‘šπ‘π‘’π‘Ÿ π‘œπ‘“ π‘œπ‘π‘ π‘’π‘Ÿπ‘£π‘Žπ‘‘π‘–π‘œπ‘›π‘ ) = (0 + 1 + 2 + 3 + 4)/5 = 10/5 = 2 ∴ Mean = 2

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.