The mean of the numbers $a, b, 8, 5, 10$ is $6$ and the variance is $6.80.$ Then which one of the following gives possible values of $a$ and $b$ $?$ 

  • [AIEEE 2008]
  • A

    $a=0 ,b=7$

  • B

    $a=5 ,b=2$

  • C

    $a=1 ,b=6$

  • D

    $a=3 ,b=4$

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