Determine the number of subsets of A = {1, 2, 3, 4, 5, 6, 7}.
If I understand correctly
1 element sets = 7 c 1 = 7
2 element sets = 7 c 2 = 21
3 35
4 35
5 21
6 7
7 1 Add them all together..........
Number of subsets =2^(number of elements) - 1 =2^7 - 1 = 127 subsets
+37153 
