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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?


( A ) a = 0, b = 7
( B ) a = 5, b = 2
( C ) a = 3, b = 4
( D ) a = 1, b = 6

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