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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 | \(3\) | \(10\) | \(11\) | \(8\) | \(3\) |
Mean \(=\)
[Note: Round off the answer to two decimal places.]
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