1
Question
Look at the table given below:
Marks
0−10
11−20
21−30
31−40
No. of students
7
8
10
5
What is the class size of the class 11−20 in this table?
(a) 9
(b) 15.5
(c) 10
(d) 4.5
| Marks | 0−10 | 11−20 | 21−30 | 31−40 |
| No. of students | 7 | 8 | 10 | 5 |
(a) 9
(b) 15.5
(c) 10
(d) 4.5
Open in App
Solution
(c) 10
We know:
Class size = True upper limit True lower limit
We form the exclusive frequency distribution table as:
Marks
No. of Students
0.5−10.5
7
10.5−20.5
8
20.5−30.5
10
30.5−40.5
5
∴ Class size = 20.5 10.5 = 10
We know:
Class size = True upper limit True lower limit
We form the exclusive frequency distribution table as:
| Marks | No. of Students |
| 0.5−10.5 | 7 |
| 10.5−20.5 | 8 |
| 20.5−30.5 | 10 |
| 30.5−40.5 | 5 |
∴ Class size = 20.5 10.5 = 10
Suggest Corrections
0
Similar questions