Question 1152322
List the number of these subsets
A={1,2,3,4}
B={a,b,c}
----------------------------
<pre>
I will answer:

Compute the number of subsets for these sets:
A={1,2,3,4}
B={a,b,c}
----------------------------

For a set of n elements, there are  {{{2^n}}} subsets.  This comes from having a choice to include or exclude each element in any given subset.
Set A has four elements so there are {{{ 2^4 = 16 }}}  subsets.  

[ For the number of proper subsets, the answer is {{{2^n - 1}}} because we exclude the one case of choosing every element. ]

Set B has three elements, apply the same idea.  You may want to list out the subsets themselves to prove to yourself there are {{{2^n }}} subsets.