The following table gives the frequency distribution of marks obtained by a batch of 20 students
Marks 5
15 25 35 45
No. of students 5 4 6 3 2
In this table the cumulative frequency of 45 is

18

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12

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20

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8

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Solution

The correct option is C $20$
Marks No. of students Cumulative Frequency
5 5 5
15 4 $5 + 4 = 9$
25 6 $9 + 6 = 15$
35 3 $15 + 3 = 18$
45 2 $18 + 2 = 20$

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Similar questions

The following table gives the frequency distribution of marks obtained by $28$ students.

$\begin{matrix} Marks & 30 & 31 & 32 & 33 Frequency & 5 & 7 & 10 & 6 \end{matrix}$

Construct the cumulative frequency table for the given data.

The data is given for 62 students in a certain class regarding their mathematics marks out of 100. Take the classes 0-10, 10-20.. and prepare frequency distribution table and cumulative frequency table more than or equal to type.

55, 60, 81, 90, 45, 65, 45, 52, 30, 85, 20, 10, 75, 95, 09, 20, 25, 39, 45, 50, 78, 70, 46, 64, 42, 58, 31, 82, 27, 11, 78, 97, 07, 22, 2 36, 35, 40, 75, 80, 47, 69, 48, 59, 32, 83, 23, 17, 77, 45, 05, 23, 37, 38, 35, 25, 46, 57, 68, 45, 47, 49.

From the prepared table, answer the following questions :

(i) How many students obtained marks 40 or above 40 ?

(ii) How many students obtained marks 90 or above 90 ?

(iii) How many students obtained marks 60 or above 60 ?

(iv) What is the cumulative frequency of equal to or more than type of the class 0-10?

The following table gives the marks obtained by the students of a class in an exam out of 50.

$\begin{matrix} Marks & No. of Students B e l o w 10 & 5 B e l o w 20 & 10 B e l o w 30 & 23 B e l o w 40 & 31 B e l o w 50 & 40 \end{matrix}$

(i) Convert the cumulative frequency distribution into a regular frequency distribution.

(ii) Find the mean. [3 MARKS]

Table 1
Marks	Frequency	Cumulative Frequency
0-10	2	2
10-20	8	10
20-30	12	22
30-40	18	40
40-50	28	68
50-60	22	90
60-70 70-80	6 4	96 100

Table 2

Class (marks )	Frequency
11-15	2
16-20	3
21-25	3
26-30	5
31-35	6
36-40	6
41-45	3
46-50	2
Total	30

Table 3

Time (in min)	Frequency
15	7
20	15
25	17
30	3
35	14
40	2

Table 4

31	42	49	25	29
40	36	24	29	30
40	46	38	34	26
24	22	39	40	21

Which table shows the cumulative frequency distribution?

In a class, following were the marks obtained by 20 students in a maths test.
20, 40 ,50 ,20 , 60 , 50 ,100, 20, 50, 100, 40, 60, 100, 50, 20 ,60, 100 , 50, 40 , 20. Make a frequency distribution table. [2 MARKS]

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The following table gives the frequency distribution of marks obtained by a batch of 20 studentsMarks515253545No. of students54632In this table the cumulative frequency of 45 is

The correct option is C 20Marks No. of students Cumulative Frequency5 5 515 4 5+4=925 6 9+6=1535 3 15+3=1845 2 18+2=20

The following table gives the frequency distribution of marks obtained by a batch of 20 students
Marks 5
15 25 35 45
No. of students 5 4 6 3 2
In this table the cumulative frequency of 45 is

The correct option is C $20$
Marks No. of students Cumulative Frequency
5 5 5
15 4 $5 + 4 = 9$
25 6 $9 + 6 = 15$
35 3 $15 + 3 = 18$
45 2 $18 + 2 = 20$