Question

he marks obtained by the student in a test of 20 marks in Mathematics are as follows. Find the median of the information. Marks 4 6 10 15 18 20 Number of students 2 4 8 12 3 1​

Answer 1

Answer:

In a class test, 50 students obtained marks as follows-

Marks obtained 0-20 20-40 40-60 60-80 80-100

No. of students 4 6 25 10 5

Find the modal class and the median class.

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Answer

Marksobtained No.ofstudents

(f) Cumulativefrequency

0−20 4 4

20−40 6 10

40−60 25 35

60−80 10 45

80−100 5 50

⇒ Here, N=50, then

2

N

=

2

50

=25

We can see, 25 is nearest to cumulative frequency 35 which has class interval 40−60

∴ Median class =40−60.

⇒ In frequency table we can see class 40−60 has highest frequency 25.

∴ Modal class =40−60

Answer 2

Answer:

Step-by-step explanation:

Median of marks = 4+6+10+15+18+20/6

= 73/6

= 12.16

median of students = 2+4+8+12+3+1/6

= 30/6

= 5