Question

Given below is the histogram depicting the
marks of 45 students of class 8 of S.D. Public
School Bijnor in the subject of Physics.
Y
10-
9
-
No. of Students
2
1
0
10 20
30 40 50 60 70 80
Marks obtained
Look at the above histogram and answer the
following questions :
(1) How many students obtained less than
10 marks ?
(ii) How many students obtained 30 or more
than 30 marks but less than 40 marks?
(iii) For being placed in the first division a
candidate has to obtain 60 or more than
60 marks, how many students got first
division marks ?
(iu) What is the interval of highest marks
and how many students are there in this
interval ?
(u) What is the class size?
Drone​

Answer 1

Answer:

The class limits are represented along the x-axis on a suitable scale and the frequencies are represented along the y-axis on a suitable scale. Taking class intervals as bases and the corresponding frequencies as heights, the rectangles can be constructed to obtain the histogram of the given frequency distribution as shown in the figure below: