SOLUTION: A die is rolled twice. What is the probability of getting a sum greater than or equal to ten?
I was thinking that it would be 1/12, Can someone please let me know if this is cor
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Question 339167: A die is rolled twice. What is the probability of getting a sum greater than or equal to ten?
I was thinking that it would be 1/12, Can someone please let me know if this is correct? Thank you:)
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Make a table detailing ALL the possible ways to roll two dice and their corresponding sum
| 1 | 2 | 3 | 4 | 5 | 6 |
|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|
| 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|
| 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|
| 4 | 5 | 6 | 7 | 8 | 9 | 10 |
|---|
| 5 | 6 | 7 | 8 | 9 | 10 | 11 |
|---|
| 6 | 7 | 8 | 9 | 10 | 11 | 12 |
|---|
Note: Each cell (not in bold) is the sum of the corresponding number in the first row and the first column (shown in bold). Ex: Say you roll a 6 and a 3. So you could choose the sixth row and intersect that with the 3rd column (or vice versa) to get 6+3=9
From the table, we can clearly see all the possible outcomes (there are 6*6=36 outcomes). Also, we can see from the table that there are 5 ways to roll a 10 or more (shown in red). So the probability is which is roughly 0.13889 (which is a 13.889% chance)
If you need more help, email me at jim_thompson5910@hotmail.com
Also, feel free to check out my tutoring website.
Jim
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