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 Posted: Mon Jul 26, 2010 3:17 am
You have three six sided dice in your hand and you have to roll them one at a time. What are the odds of you rolling a seven?
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Posted: Mon Jul 26, 2010 3:41 am
Okay so if I see here, starting with the combo 1+1+1, we have 666 possible combos for the dice, yes?
So let's see here,
5+1+1 = 7
4+2+1 = 7
3+3+1 = 7
So that's 3 out of 666.
INSERT MATH HERE.
So, if we divide 666 by 3 we get... 222
So in one of every 222 rolls we should roll 7 at least once.
OR USE LOADED DIE, yeah, I like that answer better.
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Posted: Mon Jul 26, 2010 3:43 am
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Posted: Mon Jul 26, 2010 3:49 am
Pfaaaaaw, don't tell me it's the "lol you're rolling 6-sided die, you CAN'T roll a 7" trick because then I will be very disappointed in myself.
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Posted: Mon Jul 26, 2010 3:55 am
prepare for disappointment
mrgreen
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Posted: Mon Jul 26, 2010 4:00 am
Derrai, I'm so disappointed in you.
BAD DERRAI!
NO ME NO!
insertmoredoppelgangerfightshere
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Posted: Mon Jul 26, 2010 3:02 pm
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Posted: Mon Jul 26, 2010 6:01 pm
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Posted: Tue Jul 27, 2010 2:38 pm
(This is assuming you must roll all three die. And you are attempting to add them all together to create 7, which I'm not sure we are trying to do here...)
There are 6 number options for each die.
6X6X6=216, therefore there are 216 different ways to roll the dice
ways to get 7:
first column corresponds with first die, second column with second die, and third column with third die.
1 1 5
1 2 4
1 3 3
1 4 2
1 5 1
2 1 4
2 2 3
2 3 2
2 4 1
3 1 3
3 2 2
3 3 1
4 1 2
4 2 1
5 1 1
that's 15 separate combinations in all
15/216= 5/72 or .069444 rounded.
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