The class-mark of class 50−60 is:
Consider the marks obtained by 18 students (out of 100 marks) in a science quiz
30 40 50 35 55 60 40 30 60
75 60 30 40 60 55 35 50 40
What is the frequency of the least marks obtained in the class?
Question 69
If the fifth class interval is 60-65 and fourth class interval is 55-60, then the first class interval is 45-50. ?