Discussion
Two dice are tossed. The probability that the total score is a prime number is:
Answer: B
Two dice give 36 outcomes. The prime totals are 2, 3, 5, 7 and 11:
\[ 1 + 2 + 4 + 6 + 2 = 15 \text{ outcomes} \]
\[ P = \frac{15}{36} = \frac{5}{12} \]
9 is not prime, and neither is 1 - the two totals most often included by mistake.
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