Solution:The pattern followed here is :{(1st number - 2nd number) ร 2} = 3rd number
(17, 12, 10) โ {(17 - 12) ร 2} = 10
(25, 23, 4) โ {(25 - 23) ร 2} = 4
Similarly,
(31, 27, 8) โ {(31 - 27) ร 2} = 8
Hence, "(31, 27, 8)" is the correct answer.