Question

25 students of a class obtained following respective marks out of 100 marks in subject Science:

16, 25, 30, 18, 45, 56, 87, 93, 75, 57, 65, 89, 76, 82, 34, 53, 21, 28, 91, 47, 54, 33, 78, 45, 72

Grouped frequency distribution table of above will be:

(A)

S. No.	Class	Frequency
1	0-20	2
2	20-40	6
3	40-60	7
4	60-80	5
5	80-100	5

(B)

S. No.	Class	Frequency
1	0-20	2
2	20-40	5
3	40-60	7
4	60-80	5
5	80-100	6

(C)

S. No.	Class	Frequency
1	0-20	2
2	20-40	6
3	40-60	8
4	60-80	5
5	80-100	4

(D) 

S. No.	Class	Frequency
1	0-20	3
2	20-40	6
3	40-60	7
4	60-80	5
5	80-100	4

1. C
2. D
3. A
4. B

Answer 1

Correct Answer - Option 3 : A

Concept used:

In statistics, a frequency distribution is a list, table or graph that displays the frequency of various outcomes in a sample. Each entry in the table contains the frequency or count of the occurrences of values within a particular group or interval

Calculation:

The number of students obtained less than 20 marks = 2 i.e (16, 18)

The number of students who obtained marks between 20 and 40 = 6 i.e (25, 30, 34, 21, 28, 33)

The number of students who obtained marks between 40 and 60 = 7 i.e (45, 56, 53,57, 47, 54, 45)

The number of students who obtained marks between 60 and 80 = 5 i.e (75, 65, 76, 78, 72)

The number of students who obtained marks between 80 and 100 = 5 i.e (87, 89, 82, 93, 91)

∴ The correct answer is

S. No.	Class	Frequency
1	0-20	2
2	20-40	6
3	40-60	7
4	60-80	5
5	80-100	5