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Option 4 : 82
Multiply the numbers in each row to obtain a product and add 10 to the product to get the number in the 4th column.
To illustrate,
11 × 2 × 4 = 88 +10 = 98
3 × 6 × 5 = 90 + 10 = 100
8 × 9 × 1 = 72 + 10 = 82
Hence, the missing number is 82.
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