Question

If `A` is a `6 xx 2` matrix and the sum `A+B` can be computed, what is the size of `B`? `xx`

Answer 1

Two matrices can add up only if the two matrices have the same dimensions.

Then, if A+B can be computed, the size of B must be the same as the size of A.

Therefore, the size of B is:

6 'xx' 2