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When you roll a fair die two times then the number of possible out comes are
a = { (1,1), (1,2), (1,3), (1,4), (1,5), (1,6),
(2,1), (2,2), (2,3), (2,4), (2,5), (2,6),
(3,1), (3,2), (3,3), (3,4), (3,5), (3,6),
(4,1), (4,2), (4,3), (4,4), (4,5), (4,6),
(5,1), (5,2), (5,3), (5,4), (5,5), (5,6),
(6,1), (6,2), (6,3), (6,4), (6,5), (6,6)}
Total number of outcome = 36
Set B (Sum is 7) = {(1,6),(2,5),(3,4), (4,3), (5,2),(6,1)}
Total desired outcome = 6
Probability (sum 7) = (Total desired outcome)/(Total number of outcome)
= 6/36
= 1/6 >>>answer
a = { (1,1), (1,2), (1,3), (1,4), (1,5), (1,6),
(2,1), (2,2), (2,3), (2,4), (2,5), (2,6),
(3,1), (3,2), (3,3), (3,4), (3,5), (3,6),
(4,1), (4,2), (4,3), (4,4), (4,5), (4,6),
(5,1), (5,2), (5,3), (5,4), (5,5), (5,6),
(6,1), (6,2), (6,3), (6,4), (6,5), (6,6)}
Total number of outcome = 36
Set B (Sum is 7) = {(1,6),(2,5),(3,4), (4,3), (5,2),(6,1)}
Total desired outcome = 6
Probability (sum 7) = (Total desired outcome)/(Total number of outcome)
= 6/36
= 1/6 >>>answer
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