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

• June 30th 2011, 05:05 AM
IBstudent
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....

• June 30th 2011, 05:14 AM
Plato
Re: Probability
Quote:

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.
• June 30th 2011, 05:21 AM
IBstudent
Re: Probability
Quote:

Originally Posted by Plato
Well there are $(10)(9)(8)=720$ possible combinations.

That is correct, may I ask how you got these numbers?
• June 30th 2011, 05:32 AM
IBstudent
Re: Probability
Okay nevermind guys I think I found out how.....
Thanks.