Date: 4/17/96 at 17:41:0 From: Anonymous Subject: Probability My teacher looked in his desk. He found a master lock. On the lock there were 4 sections that held 10 numbers, 0 - 9. He asked us to tell him how many different combinations were possible. I have two different ideas. I thought I could multiply 10 X 8 X 7 ... X 1. I'm not sure why I thought this, other than that I have seen problems worked like this. I tried a few examples. If there were only 2 sections and 2 numbers, I would get 4 possibilities. Then I began to think it may be worked 10 X 10 x 10 x 10. I thought about this clue when I worked 2 X 2. Am I on the right track? If so, which one?
Date: 4/17/96 at 19:39:54 From: Doctor Jodi Subject: Re: Probability Yes, I think you've got a couple of good ideas here... The number of possibilities is going to be determined by the number of choices for first times the number of choices for second times the number of choices for third... and so on. Does this make sense? So how many possibilities do you find? -Doctor Jodi, The Math Forum
Search the Dr. Math Library:
Ask Dr. MathTM
© 1994- The Math Forum at NCTM. All rights reserved.