# Tag Info

Accepted

### Simulating an unbiased coin with a biased one

One possibility: This works because: EDIT: Inspired by @trolley813's answer here is a way to recycle the rejected entropy:
Accepted

### Unfair coins at South Park Elementary v2

As Timmy has a "head" on his shoulders with probability of 1, he always wins at his turn. Then
Accepted

### Unfair coins at South Park Elementary

Wendy wins on the first flip with probability $1/100$. Otherwise, the game keeps going and Sally has probability $p$ to win on the next flip, which has overall probability $99/100 \times p$. If not, ...
Accepted

### Simulating a biased coin with an unbiased one

Yes, you can do it like this: Why does this work?
Accepted

### A coin flip's long tail

$p$ is a random variable, chosen with uniform probability over the interval [0,1]. The probability of two heads is $\int_0^1 p^2=\frac{1}{3}$, and by symmetry so is the probability of two tails.

### Unfair coins at South Park Elementary

The game is fair for Proof: