What is the cumulative mark for the class interval $12 - 15$ ?
class interval
6-9
9-12
12-15
15-18
18-21
mark
2
4
6
8
10

10

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12

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14

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16

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Solution

The correct option is B $12$
Cumulative frequency can also defined as the sum of all previous frequencies up to the current point.
So, $6 + 6 = 12$
So, the cumulative mark for the class interval $12 - 15$ is $12$ .

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Similar questions

Q. For the collection of numbers 12, 15, 8, 13, 12, 15, 9, 16, 24, 20, 20, 16 and 10, answer the following:

(i) What is the cumulative frequency of 16?

(ii) If 15 - 20 be an overlapping class interval when the numbers are grouped, find the cumulative frequency of the class interval.

(iii) If 15 - 20 be a nonoverlapping class interval when the numbers are grouped, find the cumulative frequency of the class interval.

Question 93

The marks obtained (out of 20) by 30 students of a class in a test are as follows :
14, 16, 15, 11, 15, 14, 13, 16, 8, 10, 7, 11, 18, 15, 14,
19, 20, 7, 10, 13, 12, 14, 15, 13, 16, 17, 14, 11, 10, 20.
Preparing a frequency distribution table for the above data using class intervals of equal width in which one class interval is 4-8 (excluding 8 and including 4).

Q. Construct a cumulative frequency distribution table from the frequency table given below:

Class Interval	Frequency
0 - 8	9
8 - 16	13
16 - 24	12
24 - 32	7
32 - 40	15

Q. Find the mode of the following distribution.
(i)

Class-interval:	0-10	10-20	20-30	30-40	40-50	50-60	60-70	70-80
Frequency:	$5$	$8$	$7$	$12$	$28$	$20$	$10$	$10$

(ii)

Class-interval:	10-15	15-20	20-25	25-30	30-35	35-40
Frequency:	$30$	$45$	$75$	$35$	$25$	$15$

(iii)

Class-interval:	25-30	30-35	35-40	40-45	45-50	50-60
Frequency:	$25$	$34$	$50$	$42$	$38$	$14$

Q. What is the cumulative frequency of the modal class of the following distribution?

Class	3−6	6−9	9−12	12−15	15−18	18−21	21−24
Frequency	7	13	10	23	4	21	16

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What is the cumulative mark for the class interval 12−15?class interval6-99-1212-1515-1818-21mark246810

The correct option is B 12Cumulative frequency can also defined as the sum of all previous frequencies up to the current point.So, 6+6=12So, the cumulative mark for the class interval 12−15 is 12.

What is the cumulative mark for the class interval $12 - 15$ ?
class interval
6-9
9-12
12-15
15-18
18-21
mark
2
4
6
8
10

The correct option is B $12$
Cumulative frequency can also defined as the sum of all previous frequencies up to the current point.
So, $6 + 6 = 12$
So, the cumulative mark for the class interval $12 - 15$ is $12$ .