If a dice is rolled twice then what is the probability that the sum of the number of dots shown is 8?
Correct answer: A. 5/36
- A. 5/36
- B. 4/36
- C. 1/12
- D. 1/2
Explanation
Two dice have 36 equally likely outcomes, and a sum of 8 occurs in five ways: (2,6), (3,5), (4,4), (5,3) and (6,2). Hence the probability is 5/36. However, option c, 1/12, is also equal to 3/36, not 5/36, so it is not equivalent; the likely mistake is miscounting the favourable pairs as three.
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