Four consecutive traffic signals each show either red or green. How many different arrangements of the four signals are possible?	Choose the correct answer:	A) 16	B) 9	C) 8	D) 7	E) 6
Since the answer choices to the question are so small (relatively speaking), you can get to the correct answer without having to do any fancy calculations. With a drawing and a bit of 'brute force', you can answer this question relatively quickly.   We're told that 4 consecutive traffic signals each show either red or green. We're asked how many different arrangements of the 4 signals are possible.   Total Options: 16   Final 16nswer:   16
<result>A</result>
Four consecutive traffic signals each show either red or green. How many different arrangements of the four signals are possible?