The folowing data gives the literacy rate in percentage of 35 cities.find mean literacy rate Literacy ratei % - 45-55 | 55-65 | 65-75 | 75-85 | 85-95 | Number of cities - 3 | 10 | 11 | 8 | 3 |

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

$\begin{matrix} Class Interval & 45 - 55 & 55 - 65 & 65 - 75 & 75 - 85 & 85 - 95 No.of cities & 3 & 10 & 11 & 8 & 3 \end{matrix}$

Find the mean literacy rate.

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

Question 9
The following table gives the literacy rate (in percentage) of 35 cities. Find the mean literacy rate.

$\begin{matrix} Literacy rate (in %) & 45 - 55 & 55 - 65 & 65 - 75 & 75 - 85 & 85 - 95 Number of cities & 3 & 10 & 11 & 8 & 3 \end{matrix}$

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

$\begin{matrix} L i t e r a c y r a t e (i n p e r c e n t a g e) & 45 - 55 & 55 - 65 & 65 - 75 & 75 - 85 & 85 - 95 N u m b e r o f c i t i e s & 3 & 10 & 11 & 8 & 3 \end{matrix}$

The following table gives the literacy rate (in percentage) of 35 cities. Find the mean literacy rate by step deviation method.
$\begin{matrix} Literacy rate (in %) & No. of cities 45 - 55 & 3 55 - 65 & 10 65 - 75 & 11 75 - 85 & 8 85 - 95 & 3 \end{matrix}$

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