Question

19. Mr. Kumar is a Maths teacher who is working in KV Gachibowli Hyderabad. In his
class X, total 80 students are there. He decided to teach them as per their capabilities. So,
he conducted one revision test on the basis of class IX result
. The maximum marks were
50. There were 12 students who scored less than 10 marks. Shruthi who got 3 marks was
handed over a red card as an intimation to work hard for one month and show
improvement, as she scored the least in the class. Anish was presented a badge of honour
for scoring the highest in the class. He scored 48 marks. Best performer badge given to
Anish. Mr. Kumar prepared a frequency distribution table for the data of the marks
obtained by the students in the revision test as follows:
Marks
Number of students
0 - 10
12
10-20 16
20-30 21
30-40 13
40-50 18
(a) Find the lower limit of modal class of the frequency distribution obtained by Sudhakar.
(i) 10
(ii) 20
(iii) 30
(iv) 40​

Answer 1

Answer:

students in this

the lower limit is;

20-30 so,

Here the lower is 20 so ,

Ans, 20

Answer 2

Answer:

The lower limit of model class is

Step-by-step explanation:

Here it is given as number of students is 80

Frequency distribution is higher is 21

Therefore we have 20 students are having higher frequency is 21

Therefore, 20 is lower limit of modal class of the frequency distribution.

Option (ii) is correct.