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Posted by on Thursday, August 6, 2009 at 4:19pm.

How many ways can 9 cars be parked in a row of 9 parking spaces?
Answer: 81 ways
Is this correct?
Thanks for your help.

  • Math - , Thursday, August 6, 2009 at 4:29pm

    No. I would look at the factorial.

  • Math - , Thursday, August 6, 2009 at 5:48pm

    I think that I see what I did wrong.
    Should it be 9*8*7*6*5*4*3*2*1?
    Thanks.

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