The average weight of a group of $20 \,boys$ was calculated to be $89.4\, kg$ and it was later discovered that one weight was misread as $78 \,kg$ instead of $87 \,kg.$ The correct average weight is (in $kg.$)

  • A

    $88.95$

  • B

    $89.25$

  • C

    $89.55$

  • D

    $89.85$

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