Question

-3. 5. Over a long period of time a certain drug has been effective in 80% of the cases in which it has been prescribed. If a doctor is now administering this drug to four patients, what is the probability that it will be effective for three of them? Show the result of probability calculations and circle one of the multiple choice answers. 6 points) A) 0.2048 B) 0.4096 C) 0.6211 D) 0.3281