# The following table gives the literacy rate (in percentage) of 35 cities. Find the mean literacy rate.

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The following table gives the literacy rate (in percentage) of 35 cities. Find the mean literacy rate.

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a = 70; h = 10

∴ $\overline{x}= a+\frac{\Sigma f_iu_i}{\Sigma f_i}\times h$

$\overline{x}$ = 70 − $\frac{2}{35}$ × 10

= 70 – $\frac{2}{35}$ × 10

= 70 – $\frac{20}{35}$

= 70 – 0.57142

= 69.4285

≃ 69.43%