Answer:
Step-by-step explanation:
Notice that H is a set with 106 - 81 = 25 elements.
Hence H has [tex]2^{25}[/tex] subsets.
In order to get the proper subsets of H we just need to deduct one from [tex]2^{25}[/tex]
So there are [tex]2^{25}-1[/tex] proper subsets.
