How many ordered pairs $( A , B )$ of disjoint subsets of the set $\{ 1,2,3,4,5,6 \}$ are there? [3 points] (1) 729 (2) 720 (3) 243 (4) 64 (5) 36
How many ordered pairs $( A , B )$ of disjoint subsets of the set $\{ 1,2,3,4,5,6 \}$ are there? [3 points]\\
(1) 729\\
(2) 720\\
(3) 243\\
(4) 64\\
(5) 36