Question 33: Given the set: \(A = \left\{ {1;2} \right\};B = \left\{ {3;4} \right\}\). How many sets of two elements, one of which belongs to A and the other to B?

The sets consisting of two elements, one of which is in A and the other in B is: \(\left\{ {1;3} \right\},\left\{ {2;3} \ right\},\left\{ {1;4} \right\},\left\{ {2;4} \right\}.\)

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