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propsguy

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About propsguy

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  1. Yes, we have gone over and over it, but I've been spurred to attempt to make my point again. I will agree that the answer is supposed to be 1/3;1/3 is the answer the judges are looking for. But as the puzzle is written, the answer is 1/2. The puzzle is written as: "Ok, so Teanchi and Beanchi are a married couple (dont ask me whose he and whose she)! They have two kids, one of them is a girl, what is the probability that the other kid is also a girl. Assume safely that the porbability of each gender is 1/2." The puzzle should have been written as: Ok, so Teanchi and Beanchi a
  2. "One of them is a girl" means the same exact thing as "One of which is a girl"! You're saying that adding "at least" to "One of them is a girl" changes the meaning? It doesn't! Did you think that "One of them is a girl" didn't mean at least one? Did you think it meant both? Oh really? So which one did the OP assign, the first or the second? The answer is 'neither'. "One of them" means either one of them. Not the first and not the second. Yup! Ok guys, I was willing to let it go, but now I've been forced to reach into my bag of tricks and open up a can of logical whup
  3. propsguy

    socks

    Ok, lets look at it this way (for clarity am stating the whole problem again..) A drawer has 5 black and 5 white socks. Your task is to pick a black pair, HOWEVER on removing a sock you are supposed to put it back if its not black. What is the probability of having a black pair in the 5th draw, 10th draw, 50th draw... Solution approach for a black pair on 2nd draw... To get a black pair on the 2nd draw, both the 1st draw and 2nd draw must be black. P(getting a black sock on 1st draw) = 1/2 P(getting a black sock on 2nd draw) = 4/9 (Since 1st sock was black it is not replaced leaving
  4. propsguy

    socks

    By Jove, I think I've got it, though Mdsl seems to have posted a response too. Before I read his, I'll submit mine.... The chances of getting a black pair "in" any of the mentioned draws is 1:4.5
  5. hmmmm. maybe "what is (at my) computer keyboard"
  6. I would guess it has something to so with him starting in, say, Hawaii or Alaska, and flying at a precise speed before landing in specific locations. Maybe the earth's rotation affecting his southward bearing? Or, Maybe it is just too hard.
  7. Holy crap is that good Writersblock! I'm looking for the "Bow-down" key on my computer.
  8. what is (at my) computer??
  9. I think it might be a not-so-sneaky way of saying "I read too much into the puzzle" I thought the puzzle was working with an additional, or deeper twist: like: "you have two coins in your pocket totalling 30 cents in value. One of them is not a quarter" That classic works as a puzzle, specifically because it does assign. So when I looked over the words "one of them" I took that to be a crucial part of the puzzle. I've been wrong before and I'll be wrong again Dammit. Sneaky?... not so much.
  10. propsguy

    socks

    7. Your task is to pick a black pair, on removing a sock you are supposed to put it back if its not black. What is the probability of having a black pair in the 5th draw, 10th draw, 50th draw Oww, my head hurts. A question for you: If the first sock happens to be a white one, and you put it back does the next sock picked count as the 2nd draw, or the 1st? I'm assuming that you mean it to count as the 2nd. And so on....
  11. this is the problem. let me requote the important part (middle line) "They have two kids, one of them is a girl, what is the probability that the other kid is also a girl." "they have two kids." They already have them. They're not expecting kids... they already have both of them born. The kids could be 20 and 18 years old for all we care. "One of them is a girl" okay... so if we have two kids, already born, and we can rule out B/B: G/B B/G G/G "what is the probability that the other kid is also a girl." not: "what is the probability that the other kid will be a girl
  12. Like a mom's trick with two children and the last piece of cake: one gets to cut, the other gets to choose.
  13. Hamilton was Burr's second in the duel. They were on the same 'side'?
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