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  • Need Solution for R.D.Sharma Maths Class 12 Chapter 30 Probability Exercise Multiple Choice Questions Question 44 Maths Textbook Solution.

Need Solution for R.D.Sharma Maths Class 12 Chapter 30 Probability  Exercise Multiple Choice Questions  Question 44 Maths Textbook Solution.

Answers (1)

Answer:(a)

Hint: You must know the rules of finding probability.

Given: A flash light 8 batteries out of 3 are dead.

2 batteries are selected without replacement.

Solution: Total number of batteries = 8

Total number of dead batteries = 3

Let A be the event of selecting first dead battery and B of selecting second dead battery

P(both dead are selected) ==P(A) \times P\left(\frac{B}{A}\right)=P(A \cap B)

\begin{aligned} &=\frac{3}{8} \times \frac{2}{7} \\ &=\frac{3}{28} \end{aligned}

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