Question

Commissioner of Regional office Jaipur prepared a table of the performance of students

studying in Kendriya Vidyalya. He was informed that the average marks

of students is 53.

MARKS 0-20 20-40 40-60 60-80 80-100 100-120

NO. OF

STUDENTS

15 18 21 29 p 0

1) How many students got above 80 percent a) 17 b) none c) 53 d) 80

2) What is the lower limit of the modal class a)20 b) 40 c) 60 d) 80

3) The class size is a) 10 b) 20 c) 100 d)120

4) The class mark of the third class interval is a) 40 b) 50 c) 60 d) none of the above ​

Answer 1

Answer:

the class size of one is 10 and 20 and may be 30