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Two fair dice are rolled together. What is the probability that the sum of the numbers is 7?

Competition practiceProbability & Permutation
  • A5/36
  • B1/9
  • C1/12
  • D1/6

Step-by-Step Solution

Favourable pairs summing to 7 are (1,6),(2,5),(3,4),(4,3),(5,2),(6,1) = 6 of 36, so probability = 6/36 = 1/6.
Answer: D) 1/6

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