Question 938464


The general formula for number of subsets is {{{2^n}}} and the number of proper subsets is {{{2^n - 1}}}, where {{{n}}} is the number of elements.
 
if given set { .{{{11}}}, {{{14}}}, {{{17}}}, {{{2}}}.}, we can see that the number of elements is {{{n=4}}}

so, the number of subsets is 

{{{2^n=2^4=16}}} 

and the number of proper subsets is

{{{2^n - 1=2^4 - 1=16-1=15}}}