A frequency polygon is drawn for classes 10-20, 20-30, 30-40 with frequencies 5, 9, 4. To close the polygon, points are also taken at imagined classes 0-10 and 40-50, each with frequency 0. What is the x-coordinate of the left closing point?

Question

Accepted Answer

5. The imagined class before 10-20 is 0-10, whose class mark is (0+10)/2 = 5. So the closing point is (5, 0).

A frequency polygon is drawn for classes 10-20, 20-30, 30-40 with frequencies 5, 9, 4.
To close the polygon, points are also taken at imagined classes 0-10 and 40-50, each with frequency 0.
What is the $x$ -coordinate of the left closing point?

Step-by-Step Solution

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More Class 9 Bar Graphs and Histograms practice

A frequency polygon is drawn for classes 10-20, 20-30, 30-40 with frequencies 5, 9, 4.To close the polygon, points are also taken at imagined classes 0-10 and 40-50, each with frequency 0.What is the x-coordinate of the left closing point?

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 9 Bar Graphs and Histograms practice

A frequency polygon is drawn for classes 10-20, 20-30, 30-40 with frequencies 5, 9, 4.
To close the polygon, points are also taken at imagined classes 0-10 and 40-50, each with frequency 0.
What is the $x$ -coordinate of the left closing point?