Question

The marks obtained by 40 students of class IX in an examination are given below in the

frequency distribution table:

Marks 0-5 5-10 10-15 15-20 20-25

Frequency 6 10 8 8 8

i) What is the upper limit of the class with highest frequency?

ii) What is the class size of the class with lowest frequency?

iii) Which are the classes with the same frequencies?

iv) What is the difference between the upper limit of the class 15-20 and the lower

limit of the class 5-10?​

Answer 1

Answer:

Given that the marks obtained by 40 students of a class in an examination are

8,47,22,31,17,13,38,26,3,34,29,11,22,7,15,24,38,31,21,35,42,24, 45,23,21,27,29,49,25,48,21,15,18,27,19,45,14,34,37,34.

the frequency distribution table with equal class intervals, starting from 0−10 [where 10 is not included].

frequency table

class intervals Frequency

0−10

10−20

20−30

30−40

40−50 3

8

14

9

6

Total 40

Answer 2

Answer:

i) 10

ii) 6

iii) 8 8 8

iv) 10