A pharmaceutical company making antibiotics has to abide by certain standards set by the Food and Drug Administration. The company performs some testing on the strength of the antibiotic. In a case of 25 bottles, 4 bottles are selected for testing. If the case actually contains 5 understrength bottles, what is the probability that the sample chosen will contain no understrength bottles?
Exactly 1 understrength bottle? How many understrength bottles would be expected in the sample? What is the standard deviation of understrength bottles in the sample?