Statistical Reasoning

Question

The probabilities that a batch of 4 computers will contain 0,1,2,3, and 4 defective computers are 0.6275,0.3102,0.0575,0.0047 and 0.0001, respectively. What is the probability that a randomly selected batch of 4 computers will have at most 2 defective computers?

Answer 1

"At most 2" means 0, 1, or 2. Simply add the probabilities for each of those and you have your answer, BreAnna!