well, its usually a numerical problem where you will probably end up adding the numbers together to end up with the correct answer.
Of course the alternative to this, the subtracting probability, is where you would probably have to subtract to end with the correct solution.
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please help iam adding mixed numbers 2 1/3+3 2/3=
The probability is 0.The probability is 0.The probability is 0.The probability is 0.
The probability is 1.The probability is 1.The probability is 1.The probability is 1.
For any event A, Probability (not A) = 1 - Probability(A)
If the first roll is a three, it's impossible to get an eleven (the highest you can get is a 9), so the probability is 0. The way to get a sum of 7 is to add 3 and 4. The probability of getting a 4 on the second die is 1/6. Therefore, by adding the two probabilities of the outcomes (0 and 1/6), you get the answer: 1/6.