The marks obtained by 35 students in an examination are given below: 370,290,31,8175,170,410,378,405,380,375,315,305,325,275,241,288,261,355,402,380,178,253,428,240,210,175,154,405,380,370,306,460,328,440,425 From a cumulative frequency table with class intervals of length 50.

Explanation

The minimum marks are 154 and the maximum marks are 460. So, we take the class intervals of length 50 as 150-200, 200-250, 250-300,…450-500. Thus, we may form the cummulative frequency table as under.