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A cricket coach in Chennai grouped runs scored by 30 players. To draw a frequency polygon directly (without a histogram), which quantity must he compute for every class?

Class 9Frequency PolygonsStatistics and Probability
  • AThe class mark of each class
  • BThe mode of the data
  • CThe range of the data
  • DThe cumulative frequency

Step-by-Step Solution

Plotting a frequency polygon directly requires the class mark (mid-point) of each class against its frequency.
Answer: A) The class mark of each class

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