Who can figure this problem out?

Question

1. If Set W contains 8 numbers how many possible subsets does it have

Answer 1

I believe 4.. (I would double check(I'm not a math matician)).

Answer 2

2^8 = 256.

Think of it this way:

12345678

--------------

00000000

10000000

01000000

...

11111110

11111111

Think of the 0s and 1s as indicating whether or not the number is included in a particular subset. There are 2 states for each of 8 digits = 2^8 =256.