Construct a continuous series frequency distribution table using the data given below:
 
Class
20 -30
35 -45
50 -60
65 -75
80 -90
Frequency
6
11
5
17
7
  
The continuous frequency table will look like:
  
Class
Frequency
 -
6
 -
11
 -
5
 -
17
 -
7