Question

The above data is to be shown by a frequency polygon. The coordinates of the points to show number of students in the class 130 – 140 are:

Heights (in cm)	100 - 110	110 - 120	120 - 130	130 - 140	140 - 150
No. of students	6	8	14	10	4

पर्याय

• (130, 10)

• (135, 10)

• (10, 135)

• (10, 130)

Answer 1

(135, 10)

Explanation:

For a frequency polygon each point is (class midpoint, frequency).

Midpoint of 130 – 140 is `(130 + 140)/2 = 135` and the frequency is 10.

So, the coordinate is (135, 10).