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Question: Answered & Verified by Expert
If two dice are thrown together. Then, the probability that the sum of the numbers appearing on them is a prime number, is
MathematicsProbabilityMHT CETMHT CET 2010
Options:
  • A $1 / 2$
  • B $3 / 7$
  • C $5 / 12$
  • D $7 / 12$
Solution:
2004 Upvotes Verified Answer
The correct answer is: $5 / 12$
Total cases $=36$
Prime number are $2,3,5,7,11$. $\therefore$ Favourable cases $=15$
Required probability $=\frac{15}{36}=\frac{5}{12}$

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