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Two fair dice are thrown. Given that at least one die shows 4, what is the probability that the sum of the numbers is 8?

2700Hard UPSC Principal Vice Principal 0 replies 1 views
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Two fair dice are thrown. Given that at least one die shows 4, what is the probability that the sum of the numbers is 8?

  • A1/36
  • B1/11
  • C5/36
  • D1/6
Correct answer: B

Explanation

Outcomes with at least one 4 = 11. Of these only (4, 4) gives sum 8, so the probability is 1/11.

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