Algebra: Which number is missing from the two-way table?

Algebra
Tutor: None Selected Time limit: 1 Day

Nov 16th, 2015

Thank you for the opportunity to help you with your question!

We should note that the sum of the last colum of the two way table must be equal to the sum of the last row of the two way table.

Here the sum of the last row of the two way table is 1790

Let the missing part be x

Then the sum of the last column of the two way table =x+1273

Equate it with 1790

x+1273=1790

x=517

answer--optionC

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Nov 16th, 2015

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