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Question: Answered & Verified by Expert
In throwing of two dice, the number of exhaustive events that ' 5 ' will never appear on any one of the dice is
MathematicsProbabilityNDANDA 2015 (Phase 1)
Options:
  • A 5
  • B 18
  • C 25
  • D 36
Solution:
2284 Upvotes Verified Answer
The correct answer is: 25
$\mathrm{n}(\mathrm{S})=6 \times 6=36$
$$
\begin{array}{|rrrr|r|r}
1,1 & 1,2 & 1,3 & 1,4 & 1,5 & 1,6 \\
2,1 & 2,2 & 2,3 & 2,4 & 2,5 & 2,6 \\
3,1 & 3,2 & 3,3 & 3,4 & 3,5 & 3,6 \\
4,1 & 4,2 & 4,3 & 4,4 & 4,5 & 4,6 \\
\hline 5,1 & 5,2 & 5,3 & 5,4 & 5,5 & 5,6 \\
\hline 6,1 & 6,2 & 6,3 & 6,4 & 6,5 & 6,6
\end{array}
$$
$\therefore \quad$ Required number of exhausistance events $=(6-1) \times(6-1)=5 \times 5=25$
$\therefore \quad$ Option (c) is correct.

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