Class interval : 0-10 10-20 20-30 30-40 40-50 50-60 60-70
    Frequency : 2 12 6 10 12 7 1

    What is the cumulative frequency up to the class interval 30-40

  • 20
  • 30
  • 6
  • 10
Class interval : 0-10 10-20 20-30 30-40 40-50 50-60 60-70 Frequency : 2 12 6 1
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