Multiple choice

An unbiased die is rolled two times. What is the probability of obtaining the sum as 9?

  1. 1 18

  2. 2 3

  3. 1 3

  4. 1 9

  5. 8 9
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total outcomes for two dice = 36. Sum of 9 can be (3,6), (4,5), (5,4), (6,3). Total favorable outcomes = 4. Probability = 4/36 = 1/9.

AI explanation

The total number of outcomes when an unbiased die is rolled two times is 36. The favorable outcomes for obtaining a sum of 9 are (3, 6), (4, 5), (5, 4) and (6, 3), making a total of 4 outcomes. Using the classical probability formula, the probability is 4 divided by 36, which simplifies to 1/9.

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