2006-09-19 02:43:50 · 13 answers · asked by khanadik_ericson 1 in Science & Mathematics ➔ Mathematics
1 in 36
There are six different ways you could roll a sum of 7 (1-6, 2-5, 3-4, 4-3, 5-2, and 6-1) but there is only ONE way you can roll a sum of 2: 1-1. Similarly there is only ONE way you can roll a sum of 12: 6-6,
The probability of rolling a one with the first die is 1 in 6. The probability of rolling a one with the second die is 1 in 6. To find the probability of both happening, you multiply the two together and that is 1 in 36,
The distribution of probabilities is as follows:
chance of rolling a sum of 2: 1 in 36
chance of rolling a sum of 3: 2 in 36
chance of rolling a sum of 4: 3 in 36
chance of rolling a sum of 5: 4 in 36
chance of rolling a sum of 6: 5 in 36
chance of rolling a sum of 7: 6 in 36
chance of rolling a sum of 8: 5 in 36
chance of rolling a sum of 9: 4 in 36
chance of rolling a sum of 10: 3 in 36
chance of rolling a sum of 11: 2 in 36
chance of rolling a sum of 12: 1 in 36
(which add up to 36 chances in 36)
With 3 dice, the chance of rolling a sum of 3 (or 18) is 1 in 216,
With 4 dice the chance of rolling a sum of 4 (or 24) is 1 in 1296,
With 5 dice the chance of rolling a sum of 5 (or 30) is 1 in 7776,
With 6 dice the chance of rolling a sum of 6 (or 36) is 1 in 46656,
2006-09-19 02:46:55 · answer #1 · answered by Anonymous · 9⤊ 0⤋
There are 36 possible outcomes of the roll. That is, for each one of the six sides of one die, you could any of the 6 sides of the other die. 6*6 = 36
Now all you have to do is count the number of outcomes that will sum to 2. There is only one way to do this. You have to roll a 1 on both die.
Thus, there is a 1/36 chance of getting a sum of 2. 1 outcome out of 36 possible outcomes.
2006-09-19 09:48:47 · answer #2 · answered by Ted 4 · 1⤊ 0⤋
pretty easy. you've got a total of 6 x 6 = 36 possible outcomes. Of these, only the "1 1" gives a sum of 2.
so you have 1 chance out of 36 (p=0.02777...) to get a sum of 2.
a
2006-09-19 10:20:50 · answer #3 · answered by AntoineBachmann 5 · 2⤊ 0⤋
to get a sum of two both the dices should have 1.
the probability of 1 on one dice is 1/6
lly others prob. to have 1 is 1/6
total prob. is 1/6*1/6= 1/36
2006-09-19 10:18:01 · answer #4 · answered by sunny 2 · 1⤊ 0⤋
If one die is thrown, the chances of not rolling a one (1) are
5
--- = 0.8333
6
If two dice are thrown, the chances of not rolling a one (1) are
5 5
--- X -- = 0.6944
6 6
So, figure the chances of rolling and getting a 1 on both dice....
2006-09-19 09:55:13 · answer #5 · answered by oklatom 7 · 0⤊ 0⤋
1/6 x 1/6 = 1/36
2006-09-19 11:05:01 · answer #6 · answered by davidosterberg1 6 · 1⤊ 0⤋
to get a sum of 2, you need a 1 on each die.
probability of a 1 = 1/6
so (1/6)*(1/6)= 1/36
2006-09-19 09:46:08 · answer #7 · answered by John V 4 · 3⤊ 0⤋
1 out of possible 36 combinations!
2006-09-19 09:52:09 · answer #8 · answered by foongwk140804 7 · 1⤊ 0⤋
YOOOOLEVEN ONE TIME
just kidding, its like 1 in 36 or some garbage
2006-09-19 09:46:15 · answer #9 · answered by Anonymous · 0⤊ 0⤋
1/36 meaning once every 36 rolls.
Cheers!
2006-09-19 09:45:49 · answer #10 · answered by Anshul 2 · 2⤊ 0⤋