2022 AMC 12B Problems/Problem 12: Difference between revisions

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-==Problem==
-A pair of fair 6-sided dice is rolled <math>n</math> times. What is the least value of <math>n</math> such that the probability that the sum of the numbers face up on a roll equals <math>7</math> at least once is greater than <math>\tfrac{1}{2}</math>?
-<math>\textbf{(A)}\ 2 \qquad\textbf{(B)}\ 3 \qquad\textbf{(C)}\ 4 \qquad\textbf{(D)}\ 5 \qquad\textbf{(E)}\ 6</math>

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