Four friends took the final exam and the probability that each of them would get
ID: 2907938 • Letter: F
Question
Four friends took the final exam and the probability that each of them would get an “A” is 1/4. Use Binomial distribution (Lecture 27) to answer the following questions. We are interested in total number of A’s among these four friends. 17. What are the n and p in this (binomial) model? a. n=4 p=1/2 b. n=A and p=1/3 c. n=4 p=1/5 and k=0,1,2,3,4,.. d. ??None of the above. 18. What is the probability that 3 out of 4 friends got A's on the exam? a. b. 0.046875 c. 0.2194 d. ??None of the above. 19. Which of these is the most likely to happen? a. None of the friends got an A. b. All of them got A’s. c. Only one friend got an A. d. Only two friends got A's.
Explanation / Answer
Solution: 17. What are the n and p in this (binomial) model?
Answer: d. None of the above
The answer will be n=4, p=1/4
18. What is the probability that 3 out of 4 friends got A's on the exam?
Answer: b. 0.046875
19. Which of these is the most likely to happen?
Answer: c. Only one friend got an A.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.