Q. By taking classes 30−40,40−50,50−60,..., construct a frequency table for the following data:
65,34,74,49,52,35,71,55,61,40,56,38,52,56,52,33,60,35,49,37,53,50,44,30,62,50,47,45,47,50,63,61,54,58,47,64,37,38,44,42,47,55,70,33,75,49,47,30,60,69
Also, construct a combined histogram and frequency polygon for the distribution.