Cybersecurity Authenticatation problem, i got feedback but still cant figure it out please help.

Incorrect Question 13 0/2 pts Assume source elements of length 6 are mapped in some uniform fashion into target elements of length 3. Each digit can take on one of 9 possible values. Thus the number of source elements is 531,441 and the number of target elements is 729. A particular source element x is mapped to a target element y If the adversary is given element y, what is the probability that a different source element z (z not equal to x) that produces the target value y can be produced by the adversary in one try? (enter you answer as an exact decimal number like o.Xxxx) 0.0013698604 Basic probability asks you to compute how many choices give the desired result and divide that by number of possible choices. For example, if there are 3 possible choices that give the desired result and there are 9 possible choices, the probability of picking a desired choice is 3/9. In this problem, compute how many sources (not counting x) map to y and divide by the total number of sources