Question

Given in the table below are marks obtained by 50 students in a class test. From these data, the upper limit of the modal class is Marks 1-10 10 - 20 20 - 30 30 - 40 40 – 50 Number of Students 3 7 18 13 9 (A) 20 (B) 30 (C) 40 (D) 50 6. ​

Answer 1

Answer:

Step-by-step explanation:

Marksobtained  No.ofstudents

(f) Cumulativefrequency  

0−20  4  4  

20−40  6  10  

40−60  25  35  

60−80  10  45  

80−100  5  50  

⇒  Here, N=50, then  

2

N

​

=  

2

50

​

=25

We can see, 25 is nearest to cumulative frequency 35 which has class interval 40−60

∴  Median class =40−60.

⇒  In frequency table we can see class 40−60 has highest frequency 25.

∴  Modal class =40−60