Final answer:
The odds in favor of getting a 4 and a 5 on a fair six-sided die are both 1:6.
Step-by-step explanation:
If each face of a fair six-sided die is equally likely to turn up, the odds in favor of getting a 4 can be calculated by dividing the number of favorable outcomes (1) by the number of possible outcomes (6). Therefore, the odds in favor of getting a 4 are 1:6. Similarly, the odds in favor of getting a 5 on the die are also 1:6 since there is only one favorable outcome (getting a 5) out of the six possible outcomes.