# Math Help - probability die roll

1. ## probability die roll

Brendalee and Mohammed go to a coffee shop during their lunch break and toss a coin to see who will pay. The probability that Brendalee will pay three days in a row?

2. Originally Posted by jax760
Brendalee and Mohammed go to a coffee shop during their lunch break and toss a coin to see who will pay. The probability that Brendalee will pay three days in a row?
$\left( \frac{1}{2} \right)^3$.

3. Hi.

They toss a coin

The probability: Brendalee wins is = 1/2; Brendalee doesn't win = 1-1/2 = 1/2

Now we want to know:

probability(Brandalee loose, Brandalee loose, Brandalee loose) = 1/2 * 1/2 * 1/2 = 1/8

Edit: aaargh, too slow.