# probability die roll

• January 29th 2009, 07:36 PM
jax760
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?
• January 29th 2009, 09:04 PM
mr fantastic
Quote:

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?

$\left( \frac{1}{2} \right)^3$.
• January 29th 2009, 09:05 PM
Rapha
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.