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What does 'cumulative frequency' of a class mean?

Class 10Cumulative Frequency and OgiveStatistics and Probability
  • AThe frequency of that class only
  • BThe sum of frequencies of that class and all classes before it
  • CThe total of all frequencies in the table
  • DThe midpoint of the class

Step-by-Step Solution

Cumulative frequency (less than type) is obtained by adding up the frequency of a class and all classes preceding it.
Answer: B) The sum of frequencies of that class and all classes before it

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