Insert the missing number
Explanation:
Middle number = (difference between numbers of left column) × (sum of numbers of right column)
i.e. 80 = (15 – 5) × (2 + 6) = (10) × (8) and 65 = (9 – 4) × (7 + 6) = (5) × (13)
∴ ? = (13 – 11) × (16 + 8) = 2 × 24 = 48
Hence, option (b).