From the set of numbers {p, t, u, v, w, x, y, z}, how many different combinations can we have without the t or the u in them? Ex:. (x,y), (x), (w,z,y,x), etc... and note that (x,y)=(y,x)
Choose the correct choice from the following choices.
A) 16
B) 31
C) 32
D) 63
E) 64
Any letter (p, v, w, x, y, z) can be included or not.   Thus there are 2^6 combinations - 1 empty combination = 63 combinations   The answer is 63.
<result>D</result>
From the set of numbers {p, t, u, v, w, x, y, z}, how many different combinations can we have without the t or the u in them? Ex:. (x,y), (x), (w,z,y,x), etc... and note that (x,y)=(y,x)