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 Wait hold the phone. Do you mean its physically possible to not spend time on robotics during the season?!!! Too much.......for brain......to compute!...goes against.....beliefs........aaaaarrrrrrghhhhhh!!!
[syntax error] - BuddyB309 [more] |
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#17
07-07-2004, 19:53
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Re: Maths problems (interesting ones)
I think you're off Kris... I'm going to trust my highschool Finite math on this one...
We'll do it your way: Door Opener / Non Door opener Boy / Girl Boy / Boy Girl / Girl Girl / Boy Okay, a girl opens the door... so you say that eliminates the first two possibilities... Why? Remember, two combinations of boy/girl exist, and you've eliminated one of them for the wrong reason. Whoever opens the door does not determine what children exist in the family (with the exception of the boy/boy possibility) If you want to keep your method of reasoning, we have to add more possibilities. That is, the order of children. I'll mention the first born child, the other is safely assumed to be the second born: Door Opener / Non Door opener Boy (1st born) / Girl Boy (1st born)/ Boy Boy / Girl (1st born) Boy / Boy (1st born) Girl (1st born)/ Girl Girl (1st born)/ Boy Girl / Girl (1st born) Girl / Boy (1st born) Eliminate the Boys answering the door, you're left with the last four. We can eliminate one of the extraneous Girl/Girl possibilities as well. Girl (1st born)/ Boy Girl / Girl (1st born) Girl / Boy (1st born) Voila, 1/3. 
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