Question

The table below shows the distribution of marks gained by a group of 400 students in an examination:
Marks Less than-
10, 20, 30, 40, 50, 60, 70, 80, 90, 100 . no. of students- 5,10,30,60,105,180,270,355,390,400.
Using a scale of 2 cm to represent 10 marks and 2 cm to represent 50 students, plot these values and drawa smooth
curve through the points. Estimate from the graph:
(1) the median marks
(i) the quartile marks.​

Answer 1

Step-by-step explanation:

ANSWER

C.I 20−30 30−40 40−50 50−60 60−70 70−80 80−90

F 8 12 24 6 10 15 25

C.I less than C.I more than C.I

20−30 8 25

30−40 20 40

40−50 44 50

50−60 50 56

60−70 60 80

70−80 75 92

80−90 100 100

solution