How many sets A exist for which \(\{1, 2\} \subseteq A \subseteq \{1, 2, 3, 4, 5\}\)?
A =
{1, 2}
{1 , 2, 3}
{1, 2, 4}
{1, 2, 5}
{1, 2, 3, 4}
{1, 2, 3, 5}
{1, 2, 4, 5}
{1, 2, 3, 4, 5}
I'll leave you to count them!
