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Mathematics 21 Online
OpenStudy (anonymous):

Find the probability P(prime sum when tossing 2 dice). Write in fraction form. Please explain. Thanks

OpenStudy (accessdenied):

It would be helpful if we knew all the possible sums of the dice. I think it is easiest to use a table with numbers 1-6 on the top row and 1-6 on the left column, and just compute all the sums. Then we can easily see all the prime sums from the table. |dw:1349635556005:dw|

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