Here is a table of all possible outcomes of sums, count those that

are 7 or less.  There are 36 possible outcomes so that will be the

denominator.



       Die_1  1    2    3    4    5    6

Die_2 

  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





21/36 =  or approx. 0.583 (58.3%)





 

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