Two unbiased dies are thrown .find the probability that the sum of nos on top is either divisible by 3 or by 4

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Let A be the event getting the sum of numbers divisible by either 3 or 4 .Elementary events favourable to the event are :1,2 , 1,3 , 1,5 , 2,1 , 2,2 , 2,4 , 2,6 , 3,1 , 3,3 , 3,5 , 3,64,2 , 4,4 , 4,6 , 5,1 , 5,3 , 5,4 , 6,2 , 6,3 and 6,6 .Favourable number of outcomes=20 .Required probability=No. of favourable outcomesTotal possible outcomes=2036=59   ANS...
 
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