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COMEDK · Maths · 36. Probability

P and Q are considering to apply for a job. The probability that P applies for the job is \(\dfrac{1}{4}\). The probability that \(\mathrm{P}\) applies for the job given that \(\mathrm{Q}\) applies for the job is \(\dfrac{1}{2}\), and the probability that Q applies for the job given that P applies for the job is \(\dfrac{1}{3}\). Then the probability that \(\mathrm{P}\) does not apply for the job given that \(\mathrm{Q}\) does not apply for the job is

  1. A \(\dfrac{4}{5}\)
  2. B \(\dfrac{7}{8}\)
  3. C \(\dfrac{11}{12}\)
  4. D \(\dfrac{5}{6}\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(\dfrac{4}{5}\)

Step-by-step Solution

Detailed explanation

Let \(P\) be the event that P applies for the job and \(Q\) be the event that Q applies for the job. Given probabilities are \(P(P) = \dfrac{1}{4}\), \(P(P|Q) = \dfrac{1}{2}\), and \(P(Q|P) = \dfrac{1}{3}\). Using the definition of conditional probability,…