Question

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Question:
Marks: 4
The following table gives the literacy rate (in
%) in 40 cities. Find the mean literacy rate
by using suitable method.
Literacy rate (in%)
No. of cities
45-55
4
55-65
11
65-75
12
75-85
9
85-95
4​

Answer 1

Answer:-

Marks No. of

students

f

i

x

i

f

i

x

i

45-55 3 50 150

55-65 10 60 600

65-75 11 70 770

75-85 8 80 640

85-95 3 90 270

Σf

i

=35 Σf

i

x

i

=2430

∴Mean literacy rate=

Σf

i

Σf

i

x

i

=

35

2430

=69.43%

Answer 2

sry but is this the right ans