Hidden MC unless Table is filled

I want to hide a multiple choice question unless all 3 cells in column 3 have numbers in them. How do I do that? Is there a good example on the different ways to use the hidden function?

Hiding a multiple choice based on numbers in column 3 of table3 (change component name as necessary):

numCheck1=numericValue("${table3.cellNumericValue(1,3)}+${table3.cellNumericValue(2,3)}+${table3.cellNumericValue(3,3)}")
hidden: isUndefined(numCheck1)
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