hard · GMAT Quant
A security camera system records a 4-frame event code choosing from modes Normal (N), Alert (A), and Record (R). Operating protocols dictate that frame 1 cannot be Alert (A), frame 4 cannot be Normal (N), and no mode can be active in two consecutive frames.
How many valid 4-frame event codes can be recorded?
- 8
- 11
- 16
- 24
- 54
Sign up free to see the explanation and track your rank →
More GMAT Quant practice
- Including both endpoints, how many distinct integer price points are in this range?
- What is the final price of the jacket?
- How many total ways can the traveler get from City X to City Z?
- What is the speed of the current?
- Which of the following includes the number 0?
- If the child picks one letter at random, what is the probability that it is a consonant?
- Which of the following expressions must result in a positive value?
- Which of the following must also be an even integer?