Final answer:
The probability of winning at both machines is 0.84% and the probability of losing at both machines is 99.16%.
Step-by-step explanation:
To find the probability of winning at both machines, we can use the multiplication rule. The probability of winning at machine X is 12% or 0.12, and the probability of winning at machine Y is 7% or 0.07. Since the plays of each machine are independent, we can multiply these probabilities together to find the probability of winning at both machines. Thus, the probability of winning at both machines is 0.12 * 0.07 = 0.0084, or 0.84%.
To find the probability of losing at both machines, we can subtract the probability of winning at both machines from 1, since the sum of all probabilities should equal 1. Therefore, the probability of losing at both machines is 1 - 0.0084 = 0.9916, or 99.16%.