Two consecutive traffic signals each show either red or green. How many different arrangements of the two signals are possible? (Note: “Red-green” is different from “green-red.”)
Choose the correct choice from the following answers.
A) 10	B) 9	C) 8	D) 7	E) 4
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 2 consecutive traffic signals each show either red or green. We're asked how many different arrangements of the 2 signals are possible.   Total Options: 4   Final Answer:   4
<result>E</result>
Two consecutive traffic signals each show either red or green. How many different arrangements of the two signals are possible? (Note: “Red-green” is different from “green-red.”)