# Thread: Probability of 3-digit combination correct if no digits can be repeated.

1. ## Probability of 3-digit combination correct if no digits can be repeated.

Hey math folks!
Here is a question for you:

What is the probability that you will get a 3-digit combination correct if no digits in the combination can be repeated?

Please show me how to solve it....

2. ## Re: Probability

Originally Posted by IBstudent
What is the probability that you will get a 3-digit combination correct if no digits in the combination can be repeated?
Well there are $(10)(9)(8)=720$ possible combinations.

3. ## Re: Probability

Originally Posted by Plato
Well there are $(10)(9)(8)=720$ possible combinations.
That is correct, may I ask how you got these numbers?

4. ## Re: Probability

Okay nevermind guys I think I found out how.....
Thanks.