A random survey of the number of children of various age group playing in a park was found as follows: Draw a histogram to represent the data above.

Age(in years) Frequency Width Length of therectangle
1 - 2 5 1 51×1=5
2 - 3 3 1 31×1=3
3 - 5 6 2 62×1=3
5 - 7 12 2 122×1=6
7 - 10 9 3 93×1=3
10 - 15 10 5 105×1=2
15 - 17 4 2 42×1=2
Width is not constant. So, we have to first calculate the length of rectangle to draw histogram according to the width as shown in the above figure.