Skip to content / Đến nội dung
ThichHocToan.com

2015 AMC 12A Question 17

AMC12 · 2015 AMC 12A

Question 17

Eight people are sitting around a circular table, each holding a fair coin. All eight people flip their coins and those who flip heads stand while those who flip tails remain seated. What is the probability that no two adjacent people will stand?
  1. $\dfrac{47}{256}$
  2. $\dfrac{3}{16}$
  3. $\dfrac{49}{256}$
  4. $\dfrac{25}{128}$
  5. $\dfrac{51}{256}$