Question

Marks obtained by 200 students in an examination are given below:
Marks
10-20 20-30 30-40 40-50 5060 60-70
No. of Students 5 1 1 10 20 28 37 40
7080 8090 90-100
29 14 6
Draw an ogive for the given distribution taking 2 cm = 10.marks on one axis and 2 cm = 20
students on the other axis. Using the graph, determine
(0) The median marks.
ii) The number of students who failed if minimum marks required to pass is 40.
lii) If scoring 85 and more marks is considered as grade one, find the number of students
who secured grade one in the examination.
[5]​

Answer 1

Answer:

I = 200/2=100 th term

• =64 (app)

2. 46 (app)

3. 30 (app)

Answer 2

1)Median marks will be 57.5 as the x coordinate corresponding to n/2 I.e. 1

00

2) 46

3) 200-188=12 got 1st grade

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