SOLUTION: If C has an elements of a, b, c, d, e, f, g. It has a subset of 128. Can you show me the solution or the list of how did you get the 128? Thank you

Algebra ->  Subset -> SOLUTION: If C has an elements of a, b, c, d, e, f, g. It has a subset of 128. Can you show me the solution or the list of how did you get the 128? Thank you      Log On


   

Question 1144422: If C has an elements of a, b, c, d, e, f, g. It has a subset of 128. Can you show me the solution or the list of how did you get the 128?
Thank you
Answer by ikleyn(52778) About Me  (Show Source):
You can put this solution on YOUR website!
.

The formulation in your post is totally incorrect.

The correct formulation is THIS: 

    If the set consists of 7 elements a, b, c, d, e, f, g, how many subsets does it have ?


The answer is   2%5E7 = 128.


HINT.   The general fact is 

    If the finite set consists of n elements, then the number of all its subsets is  2%5En.

If you want more details, see the lesson
    - How many subsets are there in a given finite set of n elements?
in this site.