Final answer:
The probability of observing a sum of 4 when two fair dice are tossed is approximately 0.0833.
Step-by-step explanation:
The question is asking for the probability of obtaining a sum of 4 when two fair dice are tossed. To find this probability, we need to determine the number of favorable outcomes and divide it by the total number of possible outcomes.
There are 3 ways to obtain a sum of 4, which are (1, 3), (2, 2), and (3, 1). Since each die has 6 possible outcomes, the total number of possible outcomes is 6 * 6 = 36. Therefore, the probability of observing a sum of 4 is 3/36, which simplifies to 1/12. Rounded to four decimal places, the probability is approximately 0.0833.