SOLUTION: If a quiz has four true-false questions. How many different patterns of answers are possible?

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Question 99895: If a quiz has four true-false questions. How many different patterns of answers are possible?
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
each question has 2 posibilities & there are 4 questions. thus 4^2=16 possible patterns.
using 1 & 0 the answers we get:
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111