WBJEE · Maths · Probability
\(\mathrm{A}\) student appears for tests 1 , 11 and \(\mathrm{III}\). The student is successful if he passes in tests I,II or I, III. The probabilities of the student passing in tests I. II and III are respectively,
p,q and \(1 / 2 .\) If the probability of the student to be successful is \(1 / 2 .\) Then
- A \(p(1+q)=1\)
- B \(q(1+p)=1\)
- C \(p q=1\)
- D \(\frac{1}{p}+\frac{1}{q}=1\)
Answer & Solution
Correct Answer
(A) \(p(1+q)=1\)
Step-by-step Solution
Detailed explanation
Let \(X\) be the event that student will be successful. \(X_{1}\) be the event that student will be pass in test-I. \(X_{2}\) be the event that student will be pass in test-II. \(X_{3}\) be the event that student will be pass in test-III.…
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