The answer is D hope this helps
The answer is B because if you have 10000 hours you subtract by 3000 and it’s equals b
46.8 is 39% of 120. Hope this helped you!
If the turn out of an event is to take place or not to take place only then, the sum of the probability of it taking place and not taking place is 1. If we represent the probability of it taking place by x then, the probability of it not taking place is equal to 1 - x.
