🛠️ JEE➗ Maths

Let \(A, B\) and \(C\) be three events such that the probability that exactly one of \(A\) and \(B\) occurs is \((1-k)\)…

Q1

Let \(A, B\) and \(C\) be three events such that the probability that exactly one of \(A\) and \(B\) occurs is \((1-k)\), the probability that exactly one of \(B\) and \(C\) occurs is \((1-2 k)\), the probability that exactly one of \(C\) and \(A\) occurs is \((1-k)\) and the probability of all \(A , B\) and \(C\) occur simultaneously is \(k^2\), where \(0<k<1\). Then the probability that at least one of \(A, B\) and \(C\) occur is:

[JEE Main 2021, 20 Jul (Shift 2)]

a

greater than \(\frac{1}{2}\)

b

greater than \(\frac{1}{4}\) but less than \(\frac{1}{2}\)

c

exactly equal to \(\frac{1}{2}\)

d

greater than \(\frac{1}{8}\) but less than \(\frac{1}{4}\)

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