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The following table gives the literacy ...

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):}`

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The correct Answer is:
`69 . 43 %`
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