Several studies have been conduct on the effectiveness and safety of the H1N1 influenza vaccine. One study found that in a group that received the actual medication, the drug was 87% effective. In a group that received a placebo, there was 10% effective rate. If the study used 400 people to received the placebo and 600 people to get the actual drug, determine the probability that ant person in the study will
1) received the drug and not get sick
2) not get sick.
1 answer