Question 149030: Two dice are rolled. Find the probability of getting a sum greater than 8
Is it 0, 13/36, 2/9, 5/18.
Can you tell me how to work this out?
Thank you, Ellen
Found 2 solutions by stanbon, mangopeeler07:
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Two dice are rolled. Find the probability of getting a sum greater than 8
Is it 0, 13/36, 2/9, 5/18.
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Sketch a 6 by 6 array of the sums you get
when the 1st die is 1,2,3,4,5,6, and the 2nd die is 1,2,3,4,5,6
You should have 36 entries that range from a sum of 1+1=2 to 6+6 = 12
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count the number of sums that are greater than 8 : ?
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Divide that number by 36 to get the probability.
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Cheers,
Stan H.
Answer by mangopeeler07(462) (Show Source):
You can put this solution on YOUR website! What are the possible sums of the dice? Anywhere from 2-12. Those are eleven different sums. So eleven will be the denominator:
x/11
Now how many of those sums are greater than 8? 9, 10, 11, and 12! There are four of them, so that will be the numerator.
4/11
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