Question

calculate mean and median from the following data : class=10-20,10-30,10-40,10-50,10-60,10-70,10-80,10-90
Frequency=4,16,56,97,124,137,146,150.​

Answer 1

Answer:

barX=A+(sum fd')/(sumf)xxC

<br>

=45+20/150xx 10

<br>

=45+1.33=46.33

<br> Thus, Mean Marks = 46.33.

Answer 2

Answer:

Solution

verified

Verified by Toppr

Marks

Midpoint(x

i

)

No. of students(f

i

)

Deviation(d

i

)

u

i

u

i

f

i

0-10

5

8

-30

-3

-24

10-20

15

15

-20

-2

-30

20-30

25

22

-10

-1

-22

30-40

35

20

0

0

0

40-50

45

10

10

1

10

50-60

55

5

20

2

10

N=∑f

i

=80, h=10

A=35,d

i

=x

i

−A , u

i

=

h

d

i

Mean=A+h(

N

∑u

i

f

i

)

=35+10(

80

−56

)

Mean=28

please mark me as brinliest