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Need Solution for R.D.Sharma Maths Class 12 Chapter 30 Probability  Exercise Multiple Choice Questions  Question 40 Maths Textbook Solution.

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Answer:(c)

Hint: You must know the rules of finding probability.

Given: If A and B are two events such that P(A) \neq 0 \text { and } P(B) \neq 1

Solution: We have,P(A) \neq 0 \text { and } P(B) \neq 1

Now,

\begin{aligned} &P\left(\frac{\bar{A}}{\bar{B}}\right)=\frac{P(\bar{A} \cap \bar{B})}{P(\bar{B})} \\ &=\frac{P(\overline{A \cup B})}{P(\bar{B})} \\ &=\frac{1-P(A \cup B)}{P(\bar{B})} \end{aligned}

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