A collection of 22 laptops includes 6 defective laptops. If a sample of 3 laptops is randomly chosen from the collection, what is the probability that at least one laptop in the sample will be defective?
The probability that a laptop is defective is
The probability of a laptop not being defective is
The probability that at least one laptop is defective is given by:
P(1 defective)+P(2 defective)+P(3 defective)
, as this probability is cumulative. Let
(Sum up all of the probabilities)