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  1. Chapter 3 Class 7 Data Handling
  2. Serial order wise
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Ex 3.1, 7 The enrolment in a school during six consecutive years was as follows: 1555, 1670, 1750, 2013, 2540, 2820 Find the mean enrolment of the school for this period. Mean enrollment = (๐‘†๐‘ข๐‘š ๐‘œ๐‘“ ๐‘’๐‘›๐‘Ÿ๐‘œ๐‘™๐‘™๐‘š๐‘’๐‘›๐‘ก๐‘ )/(๐‘๐‘ข๐‘š๐‘๐‘’๐‘Ÿ ๐‘œ๐‘“ ๐‘ฆ๐‘’๐‘Ž๐‘Ÿ๐‘ ) = (1555 + 1670 + 1750 + 2013 + 2540 + 2820)/6 = 12348/6 = 2058 โˆด Mean enrollment per year is 2058 students

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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.