The mean of the marks obtained by $100$ students is $60 .$ If the marks obtained by one of the students was incorrectly calculated as $75$ whereas the actual marks obtained by him were $65,$ what is the correct mean of the marks obtained by the students?

  • A

    $59.9$

  • B

    $59$

  • C

    $58.5$

  • D

    $59.4$

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