Question 1132046
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The total space of events is the space of all pairs (a,b), where "a" and "b" are integer numbers from 1 to 6 inclusively.


So, the total space of events has 6*6 = 36 elements, that are such pairs (outcomes).


The favorable set is the set of pairs (a,b) with a + b = 3.


It consists of pairs (1,2) and (2,1), counting exactly 2 (two) elements.


Therefore, the probability under the question is the ratio  {{{2/36}}} = {{{1/18}}}.      <U>ANSWER</U>
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