Skip to content / Đến nội dung
ThichHocToan.com

MathNet 2024-part-01 — 168 problems (EN–VI) Question 113

Math Olympiad Vault · MathNet 2024-part-01 — 168 problems (EN–VI)

Question 113

Maria and Bilyana play the following game. Maria has 2024, and Bilyana has 2023 fair coins. Coins are tossed randomly - the probability of each individual coin being heads after the toss is $\frac{1}{2}$. Maria wins if there are strictly more heads among her coins than Bilyana's, otherwise Bilyana wins. What is the probability that Maria wins?
(Kristiyan Vasilev)