Question

22.(i) Calculate the mean number of persons Per house. Given

No.of persons per house: 2 3 4 5 6 Total

No.of houses : 10 25 30 25 10 100

(ii) Compute the geometric mean of the following series

Marks:0-10 10-20 20-30 30-40 40-50

No.of students: 5 7 15 25 8​

Answer 1

Answer:

Marks(I)

10-20

20-30

30-40

40-50

50-60

60-70

70-80

x

i

15

25

35

45

55

65

75

f

i

3

7

10

6

8

2

4

f

i

x

i

45

175

350

270

440

130

300

x

ˉ

=

∑f

i

∑f

i

x

i

=

40

1710

=42.75