# Thread: what are the chances?

1. ## what are the chances?

what are the chances of you asking someone when is their birthday, and their respond is today? what are the chances of that? please, extra credit

2. Probability = desired outcomes / possible ones

You are asking on one day out of 365, so I would say $\displaystyle \frac{1}{365}$

3. Originally Posted by Jameson
Probability = desired outcomes / possible ones
Just a note: this only holds if the outcomes are equally probable.

4. True. Thanks for clearing that up.

5. It's just a small detail but a very important one.

For example, it's true for a (perfect) dice: chance on throwing 6 is desired/possible = 1/6.

But let's take the lottery: chance on winning? Possible outcomes: yes and no, so 2. Chance: 1/2. I hope so, but I don't think so