Question

The following table gives the literacy rate (in percentage) of 35 cities. Find the mean literacy rate.
Literacy rate (in%): 45-55 55-65 65-75 75-85 85-95
Number of cities: 3 10 11 8 3

Answer 1

The mean of literacy rate is :

Given :

• Table given in attachment

Width of class interval = 10

Total no. of cities = 35

• Formula of mean = Σ fi.xi / fi

•By calculating in table,

• Mean = f1.x1 + f2.x2 + f3.x3 + f4.x4 + f5.x5 / f1 + f2 + f3 + f4 + f5

= 150+600+770+640+270 / 35

= 2430 / 35

= 69.42

• Hence, mean of literacy rate is 69.42 %

Answer 2

Step-by-step explanation:

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