Question

26] Find the mean of given information Literacy rate in % Number of cities 45-55 55-65 65-75 75-85 85-95 3 10 11 8 3​

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

We know that, arithmetic mean =

Σf

i

Σf

i

x

i

∴Mean literacy rate=

35

2430

=69.43%

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