there you go
http://www.mmo-champion.com/threads/...iddle-riddle-2
next riddle!
there you go
http://www.mmo-champion.com/threads/...iddle-riddle-2
next riddle!
Last edited by Grinder; 2010-12-21 at 01:18 PM.
Alexander Anderson: You monster.
Alucard: I get that a lot.
50% maybe.
50%. If you have a son, then the other is 50/50 chance of being a boy, and therefore a brother.
We know:
I have two children
one of them is my son(boy)
how big is the chance that my son has a brother? not that hard right? |_|
like 1/8 (no thats not the solution)
Last edited by Grinder; 2010-12-21 at 01:11 PM.
Alexander Anderson: You monster.
Alucard: I get that a lot.
Can't know.
there may be diffrent mothers, therefore they're not ''fully'' brothers.
Haha, then you got a nice GM. Once had a guildy who's ZG snake "TrouserSnake" was renamed (by the GM) to Bob. Since this was way back in Vanilla, we all laughed at him and his snake that got "Bobbed".
There are 4 possible gender combinations of 2 siblings:
BG, BB, GB and GG
Since we only know 1 is a son, but not whether the first or second sibling is a son we're left with 3 possible combinations:
BG, BB and GB.
Subtract 3B's and we're left with GGB. I'd say 1/3rd chance of your son having a brother.
He has a sister so 0% chance?
Ill go 33.33%
That's really not a riddle unless i'm misunderstanding it.
It depends as you said sons which could lead us to mean it's plural and your referring to both children (100%), or it could mean possessive and your just referring to one child in which case the answer is either 0% or 100% depending on the sex of the other child which we have no way of knowing.
Here's a lil one for the new ones
Peters Mother has three children: Tick Trick and... ?
make a guess
Alexander Anderson: You monster.
Alucard: I get that a lot.
Thats totally wrong. You have to pay attention to which sibling you are talking about, you can't just switch them around in the combination. BG is not the same as GB because its a different kid. If we know the first child is a boy then GB isn't a possible combination and is ruled out.
Given our combinations of BG, BB, GB, and GG if we know one slot is a B then we eliminate all combinations where that isn't the case; if its the first slot then BG and BB remain. If its the second, BB and GB remain. GG isn't a possibility, and one of the B+G combinations is eliminated.
The thing is, we can't know the probability of the second child being a boy or a girl from that alone. Just because we have assessed that there are two options doesn't mean that they are equally likely. Simply due to population trends, it is slightly more likely that the other child is a girl. Not much though, something like 52% preference.
No, thats wrong Grinder. You stink at probability.
Peters Mother has three children: Tick Trick and... ?
Peter