Multiple choice

Two cubical dice are thrown simultaneously, the probability of getting total at least '9' is ____.

  1. 5/36

  2. 5/18

  3. 10/18

  4. 1/9
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sums >= 9 are 9, 10, 11, 12. Pairs: (3,6), (4,5), (5,4), (6,3) [sum 9]; (4,6), (5,5), (6,4) [sum 10]; (5,6), (6,5) [sum 11]; (6,6) [sum 12]. Total = 4+3+2+1 = 10 outcomes. Probability = 10/36 = 5/18.

AI explanation

When two dice are thrown, the total number of outcomes is 36. The favorable outcomes for getting a sum of at least 9 are the combinations that add up to 9, 10, 11, or 12, which are 10 specific combinations. The probability is therefore 10/36, which simplifies to 5/18.

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