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JEE Mains · Maths · STD 11 - 14. probability

\(A\) तथा \(B\) दो ऐसी घटनाएँ हैं कि \(P ( A \cup B )= P ( A \cap B )\) है, तो निम्न कथनों में से कौन सा कथन गलत है ?

  1. A \(A\) तथा \(B\) समसंभावित हैं
  2. B \(P\left( {A \cap B'} \right) = 0\)
  3. C \(P\left( {A' \cap B} \right) = 0\)
  4. D \(P\left( A \right) + P\left( B \right) = 1\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(P\left( A \right) + P\left( B \right) = 1\)

Step-by-step Solution

Detailed explanation

Let \(A\) and \(B\) be two events such that \(\mathrm{P}(\mathrm{A} \cup \mathrm{B})=\mathrm{P}(\mathrm{A} \cap \mathrm{B})\) and \(\mathrm{P}(\mathrm{A} \cup \mathrm{B})=\mathrm{P}(\mathrm{A})+\mathrm{P}(\mathrm{B})-\mathrm{P}(\mathrm{A} \cap \mathrm{B})\) option (a) : since…
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