Final answer:
The probability of rolling a 4 given that the number rolled is odd is 0 because 4 is an even number and cannot be included in the outcomes for an odd number roll.
Step-by-step explanation:
When considering the situation of rolling a single fair die and finding the probability that the number rolled is 4 given that it is odd, there seems to be a misunderstanding. A number cannot be both odd and four simultaneously as 4 is an even number. Therefore, the probability of rolling a 4 given that the number rolled is odd is 0. For clarification, the possible odd numbers on a die are 1, 3, and 5. Since 4 is not in this set, it's impossible for the event 'rolling a 4' to occur given that 'the number rolled is odd'.