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A = { ( 2, 2 ), ( 2, 4 ), ( 2, 6 ), ( 4, 2 ), ( 4, 4 ), ( 4, 6 ), ( 6, 2 ), ( 6, 4 ), ( 6, 6 ) }
n(A) = 9
n(S) = 6² = 36
2).
A = { 1A, 2A }
n(A) = 2
n(S) = 6 × 2 = 12