Solution:The pattern followed here is :{(1st number × 2) + 1} = 2nd number & {(2nd number × 2) + 2} = 3rd number
(17, 35, 72) → {(17 × 2) + 1} = 35 & {(35 × 2) + 2} = 72
(13, 27, 56) → {(13 × 2) + 1} = 27 & {(27 × 2) + 2} = 56
Similarly,
(15, 31, 64) → {(15 × 2) + 1} = 31 & {(31 × 2) + 2} = 64
Hence, "(15, 31, 64)" is the correct answer.