Answer:
0.73
Step-by-step explanation:
the probability that it is not X is 1-0.4 = 0.6
The probability that it is not Y is 1-0.5 = 0.5
The probability that it is not Z is 1-0.1 = 0.9
So the probability that it is not any of these is
0.6x0.5x0.9 = 0.27
So the probability that it is X Y or Z is 1-0.27 = 0.73
