Question

10. For the following distribution if 5 = 45, find the missing frequency
0-10
C.I.
f
10-20 20-30 30-40 40-50 50-60 | 60-70 70-80
8
7
28. 20 10 10
5​

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