A dice is thrown twice and the sum of the numbers appearing is obse...

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A dice is thrown twice and the sum of the numbers appearing is observed to be 8. The conditional
\( \mathrm{P} \) probability that the number 5 has appeared at least once is

W
(A) \( 1 / 6 \)
(B) \( 2 / 5 \)
(C) \( 3 / 5 \)
(D) \( 1 / 2 \)
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