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Yeah BlackAdder Send a noteboard - 25/05/2010 05:05:16 AM
What they did there made no sense. There's no difference between Boy-Girl and Girl-Boy, because the order of birth has nothing to do with the question. The 13/27 thing suffers from the same problem. They say that BTu-BTu can only be counted once, and can't be counted again when you switch them around ... but at the same time, they're counting things twice by switching them around all the way through (saying, for example, that BTu-BWe is a different probability from BWe-BTu). Essentially, they're saying that the order doesn't matter when both boys are born on a Tuesday, but the order matters in every other case. They're not even applying their own logic evenly throughout the problem, it seems.

Even if, for some reason, you really want to use the irrelevent Tuesday information in the Math, it should still come out to 7/14.

Like ... are we missing something? Or is that just a surprisingly faulty math article?
Just like BB and GG are actually reversible as well... B1B2/B2B1 and G1G2/G2G1. Their logic seems inconsistent.
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Recreational mathematics - 24/05/2010 09:17:27 PM 1112 Views
How is boy/girl different from girl/boy? - 25/05/2010 01:05:15 AM 959 Views
I think it has to do with sequence - 25/05/2010 08:37:05 AM 837 Views
The problem doesn't state the sequence, so there's no reason to assume it. - 25/05/2010 08:56:09 AM 924 Views
Yes there is - 25/05/2010 10:36:02 AM 812 Views
Then see my response. - 25/05/2010 12:20:04 PM 761 Views
Faulty "logic". 2/4 - 25/05/2010 02:12:54 AM 999 Views
I was going to say. - 25/05/2010 02:48:38 AM 851 Views
Yeah - 25/05/2010 05:05:16 AM 817 Views
Re: Yeah - 25/05/2010 09:52:58 AM 1041 Views
I don't know Python, but I think I know what went wrong there. - 25/05/2010 11:33:18 AM 860 Views
Re: I don't know Python, but I think I know what went wrong there. - 25/05/2010 01:53:01 PM 1015 Views
Ah, I see now; sorry. - 25/05/2010 02:27:05 PM 818 Views
It's also playing off your mental biases - 25/05/2010 04:49:40 PM 785 Views
If you stop now I'll still be verbal. - 26/05/2010 10:58:27 AM 819 Views
I think I see where I went wrong. - 25/05/2010 07:44:25 PM 763 Views

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