The average age of a committee of $8$ members is $40 \,years.$ A member, aged $55\, years,$ retired and he was replaced by a member aged $39\, years.$ The average age of the present committee is (in $years$) 

  • A

    $39$

  • B

    $38$

  • C

    $36$

  • D

    $35$

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