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  1. Chapter 9 Class 6 Data Handling
  2. Serial order wise
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Ex 9.1, 1 In a Mathematics test, the following marks were obtained by 40 students . Arrange these marks in a table using tally marks. (a) Find how many students obtained marks equal to or more than 7 Number of students whose marks equal to or more than 7 = Number of students with marks 7 + Number of students with marks 8 + Number of students with marks 9 = 5 + 4 + 3 = 9 + 3 = 12 Ex 9.1, 1 (b) How many students obtained marks below 4?Number of students whose marks below 4 = Number of students with marks 1 + Number of students with marks 2 + Number of students with marks 3 = 2 + 3 + 3 = 5 + 3 = 8

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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.