AP EAMCET · Maths · Probability
If two unbiased six-faced dice are thrown simultaneously until a sum of either or occurs, then the probability that comes before is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(B)
Step-by-step Solution
Detailed explanation
Consider A and B be the events when the sum is obtained as 7 and 11 respectively. Number of times sum 7 and 11 occur are, n(A)={(2,5),(5,2),(3,4),(4,3),(1,6),(6,1)}=6 n(B)={(5,6),(6,5)}=2 Now, the probability is, P(A)=636=16 P(B)=236=118 The probability when neither the sum…
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