Who wins the first head?
Players A and B alternately toss a fair coin, with A going first. The first to flip heads wins. What is P(A wins)? (to 3 decimals)
Show hints (2)+
- Sum a geometric series over A's turns.
- Or set up a one-line recursion.
Answer
Reveal answer →Final answer
0.6667 (± 0.005)
Want the full step-by-step worked solution? It's part of Premium — along with a worked solution for every question in the bank.