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A frequency polygon is drawn for the following data. So the x-coordinate of the point having y coordinate as 21 is
  • a)
    30
  • b)
    20
  • c)
    25
  • d)
    35
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
A frequency polygon is drawn for the following data. So the x-coordina...
A frequency polygon is made by joining the mid points of each bar of a histogram along with 2 imaginary class intervals. Hence, for any point on a frequency polygon the y co-ordinate is the frequency and x co - ordinate is the Class Mark of the interval. In this case, the class mark of the interval 20-30 is 25 . Therefore the correct option is 'c'.

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A frequency polygon is drawn for the following data. So the x-coordina...
A frequency polygon is made by joining the mid points of each bar of a histogram along with 2 imaginary class intervals. Hence, for any point on a frequency polygon the y co-ordinate is the frequency and x co - ordinate is the Class Mark of the interval. In this case, the class mark of the interval 20-30 is 25.
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