UPSKILL MATH PLUS

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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.]