Answer
The formula is $2^n$
.
For example, the set {A, B, C} has $2^3=8$ subsets.
Work Step by Step
The formula for finding the number of distinct subsets for a given set with $n$ distinct elements is:
$2^n$
An example would be:
{A, B, C}
The subsets are:
{A, B, C}
{A, B}
{A, C}
{B, C}
{A}
{B}
{C}
{}
There are 8 of them. The set has 3 elements.
$2^3=8$