The Vermont Department of Health offers a service of testing water samples for the bacteria E. Coli. To savetime and money, the state could test these samples in batches. Suppose they batch them into groups of three.If the batch passes, then all three pass. If the batch fails, then each member is to be tested individually.Assume the department of health receives 300 samples and they subgroup these into 100 batches of 3 sampleseach. Further, assume there is a 5% chance of finding E. Coli in any single sample.

What is the probability that any batch of three samples will test positive for E. Coli?

Display keyboard shortcuts for Rich Content Editor