Saturday, April 23, 2011

AMC12A 2011 Problem #14

I've gotten several comments stating that the problems I've been doing have been too simple, and that they want more of a challenge. For this reason, I have decided to skip some of the simpler problems on the test, and move on to a more challenging section.
Another change I will be making, is I will now be posting the next day's question at the bottom of each post, for those of you who want to try and do the problems by yourself.


Problem:
Suppose a and b are single-digit positive integers chosen independently and at random. What is the probability that the point (a,b) lies above the parabola y=ax^2-bx.


Good luck! and remember, calculators are not allowed.
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10 comments:

  1. Diogo CaladoApril 23, 2011 at 3:06 PM

    I'm really stumped with this one, I should really check again this subject.

    ReplyDelete
  2. MichelangeloApril 23, 2011 at 5:51 PM

    Ahhh, why can't i solve a simple problem like that! I am not in my best days!

    ReplyDelete
  3. AkioApril 23, 2011 at 9:40 PM

    AHHHHH, I already had to take this once in school! 19/81

    ReplyDelete
  4. Takashi GoroApril 24, 2011 at 1:04 AM

    lol nice

    ReplyDelete
  5. DeadlockApril 24, 2011 at 1:05 AM

    Hmmm... I love math!

    ReplyDelete
  6. ScrogglezApril 24, 2011 at 1:27 AM

    idk man


    this makes me hate math

    ReplyDelete
  7. biboaApril 24, 2011 at 1:55 AM

    haha, not today! :D

    utubed.blogspot.com

    ReplyDelete
  8. The SuitApril 24, 2011 at 2:31 AM

    Oh probability. I'm so glad I was able to finish up with it in High school so I didn't have to worry about it in college.

    ReplyDelete
  9. gomzarApril 24, 2011 at 2:49 AM

    I could probably do it except I want to get probability out of my life as much as possible. Hated it in High School.

    ReplyDelete
  10. goat-on-a-stikApril 24, 2011 at 3:53 AM

    please excuse my head while it explodes

    ReplyDelete

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