Marks | 10-20 | 30-30 | 30-40 | 40-50 | 50-60 | 60-70 |
Frequency | 10 | 15 | 30 | 32 | 8 | 5 |
Answer:
(1)
Now, plot the points (20,10), (30, 25), (40, 55),
(50, 87), (60, 95), (70, 100).
Total number of students =100
students
In order to find the median, we first locate the point corresponding
to student
on V-axis. Let the point be P from this point draw a line parallel to
the X-axis cutting the curve at Q. From this point Q, draw line parallel to Y-axis
and meeting .Y-axis at the point M
The X-axis coordinate of At is 383.
Hence, the required median is 38.3. (1)
Marks
Number of
students(f)
10-20
20-30
30-40
40-50
50-60
60-70
10
15
30
32
8
5
Total
Marks
Number of
students(f)
Less than
20
Less than 30
Less than 40
Less than 50
Less than 60
Less than 70
10
25
55
87
95
100
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