If a fair standard 6-sided die is rolled twice, what is the probability that the sum of the two numbers is equal to ?
Answer and explanation
Correct answer: A.
- Step 1: The total number of outcomes when rolling two dice is .
- Step 2: Identify all pairs summing to 7: .
- Step 3: There are exactly favorable outcomes.
- Step 4: Compute probability: .
Answer
.
Why not the others: '' is ; '' incorrectly assumes 7 pairs; '' is the probability of obtaining sum 6 or 8.
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