Question

Weight of the students in a class is represented in a grouped frequency table.

Weight (Kg)	Frequency (No. of students)
30 - 40	10
40 - 50	7
50 - 60	12
60 - 70	15
70 - 80	9
80 - 90	3
90 - 100	1

What is the Greater than type cumulative frequency of group having 7 frequency?

• A. 7
• B. 47
• C. 17
• D. 25

Answer 1

The correct option is B 47

The progressive sum of the frequencies from the last class to the lower boundary of the particular data class is the Greater than cumulative frequency.

For example :-

Weight (Kg)	Frequency (No. of students)	Cumulative Frequency
30 - 40	10	47 + 10 = 57
40 - 50	7	40 + 7 =47
50 - 60	12	28 + 12 = 40
60 - 70	15	13+15 = 28
70 - 80	9	4+9 = 13
80 - 90	3	1+3 = 4
90 - 100	1	1+0 = 1

The progressive sum of the frequencies from the last class 90 - 100 to lower boundary 40 of the particular data class 40 - 50 is 47, so 47 is the Greater than the cumulative frequency of group having 7 frequency.