Question

From the following frequency distribution find out the median : Marks 0-10 , 10-20 , 20-30 , 30-40 , 40-50 No of students 10 , 8 , 6 , 12 , 4

Answer 1

Answer:

First we find (

2

N

)

th

value i.e. (

2

55

)

th

=27.5

th

which lies in 20 - 30 ∴ 20 - 30 class in median class

Class f c.f.

0 - 10 5 5

10 - 20 10 15

20 - 30 20 35

30 - 40 7 42

40 - 50 8 50

50 - 60 5 55

Here l=20,

2

N

=27.5,C=15,f=20,h=10

∴ median =20+

20

27.5−15

×10 Median = 26.25

Answer 2

Answer:

arrange no. of students in acending order

4 , 6, 8, 10, 12

so ,

median = 8