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Homework Help: Probability question

  1. Oct 1, 2011 #1
    1. The problem statement, all variables and given/known data
    There are 10 adjacent parking places in the parking lot. When you arrive in your new Chevrolet , there are already 7 cars in the lot. What is the probability that you can find two adjacent unoccupied spaces for your Chevrolet?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Oct 1, 2011 #2


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    Homework Helper

    What have you tried?
  4. Oct 1, 2011 #3


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    Science Advisor

    Posting just the one question instead of your whole assignment is an improvement, but you're still supposed to show that you've made some effort yourself. See: https://www.physicsforums.com/showthread.php?t=531087

    First you need to find the total number of combinations having three available spaces out of ten. (the easy part).

    Then you need to find all the combinations of ways that you can have two adjacent spaces when there are three (of 10) spaces available.
    Last edited: Oct 1, 2011
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