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A frequency polygon is obtained by joining the:

Class 9Bar Graphs and HistogramsStatistics and Probability
  • AMidpoints of the tops of histogram bars
  • BLower limits of classes
  • CCorners of the axes
  • DUpper limits only

Step-by-Step Solution

A frequency polygon joins the midpoints (class-mark, frequency points) of the tops of histogram bars with line segments.
Answer: A) Midpoints of the tops of histogram bars

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