Answers:
128 subsets
127 proper subsets
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If we have a set A = {x is some integer such that 7 < x < 15}
Then set A can be written as A = {8, 9, 10, 11, 12, 13, 14}. This is called roster notation. We write every integer between 7 and 15, excluding both 7 and 15.
There are 7 items in set A. So n = 7
This means there are 2^n = 2^7 = 128 different subsets possible
And there are (2^n) - 1 = (2^7) - 1 = 128-1 = 127 different proper subsets. A proper subset is a subset that is smaller than the original set
