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If the probabilities that A and B will die within a year are p and q respectively, then the probability that only one of them will be alive at the end of the year is
  • a)
    pq
  • b)
    p(1-q)
  • c)
    q(1-p)
  • d)
    p + q - 2pq
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
If the probabilities that A and B will die within a year are p and q r...
p (1- q) + q(l - p ) = p + q - 2 pq. 
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If the probabilities that A and B will die within a year are p and q respectively, then the probability that only one of them will be alive at the end of the year isa)pqb)p(1-q)c)q(1-p)d)p + q - 2pqCorrect answer is option 'D'. Can you explain this answer?
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