Given Set H:
[tex]H=\lbrace4,3,6,5\rbrace[/tex]You can find the number of subsets the set has by using this formula:
[tex]Number\text{ }of\text{ }subsets=2^n[/tex]Where "n" is the number of elements the set has.
In this case:
[tex]n=4[/tex]Then:
[tex]Number\text{ }of\text{ }subsets=2^4=16[/tex]By definition, given a set:
[tex]\lbrace a,b\rbrace[/tex]Its subsets are:
[tex]\lbrace a\rbrace,\lbrace b\rbrace,\lbrace\phi\rbrace,\lbrace a,b\rbrace[/tex]Therefore, in this case, you can determine that the possible subsets of the given set are:
[tex]\lbrace4\rbrace,\lbrace3\rbrace,\lbrace6\rbrace,\lbrace5\rbrace,\lbrace4,3\rbrace,\lbrace4,6\rbrace,\lbrace4,5\rbrace,\lbrace3,6\rbrace,\lbrace3,5\rbrace,\lbrace6,5\rbrace,\lbrace4,3,6\rbrace,\lbrace3,6,5\rbrace,\lbrace4,6,5\rbrace,\lbrace4,3,5\rbrace,\lbrace4,3,6,5\rbrace,\lbrace\phi\rbrace[/tex]Hence, the answer is:
[tex]\lbrace4\rbrace,\lbrace3\rbrace,\lbrace6\rbrace,\lbrace5\rbrace,\lbrace4,3\rbrace,\lbrace4,6\rbrace,\lbrace4,5\rbrace,\lbrace3,6\rbrace,\lbrace3,5\rbrace,\lbrace6,5\rbrace,\lbrace4,3,6\rbrace,\lbrace3,6,5\rbrace,\lbrace4,6,5\rbrace,\lbrace4,3,5\rbrace,\lbrace4,3,6,5\rbrace,\lbrace\phi\rbrace[/tex]