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A continuous frequency distribution has equal classes. The class mark of the third class is 35
and the class size is 10.
What is the lower limit of the third class?

Class 9Bar Graphs and HistogramsStatistics and Probability
  • A30
  • B60
  • C33
  • D27

Step-by-Step Solution

Class mark = (lower + upper)/2 and width = 10, so lower = class mark - width/2 = 35 - 5 = 30.
Answer: A) 30

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