Yes you did those two correctly
Answer:
Please view this i think that is C
Step-by-step explanation:
P(defective) = 3/12 = 1/4
P(good) = 1 - 1/4 = 3/4



The probability that at least 2 units are good is given by:
P(2 good) + P(3 good) + P(4 good) = 0.211 + 0.422 + 0.316 = 0.949.
I think it’s A I’m not 100 percent sure tho sorry if I’m wrong
The awnser would be a because the cylinders have the same size which means they have the same volume