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  • Please Solve R.D. Sharma class 12 Chapter 30 Probaility Exercise Multiple Choice Questions Question 1 Maths Textbook Solution.

Please Solve R.D. Sharma class 12 Chapter 30 Probaility  Exercise Multiple Choice Questions Question 1 Maths Textbook Solution.

Answers (1)

Answer:  (a)

Hint: You must know the rules of finding probability.

Given:

Box 1= 3W + 1B

Box 2 = 2W + 2B

Box 3 = 1W + 3B

Solution:Here three boxes contains 3 white, 1 black and 2 white, 2 black and 1 white  3 black

\begin{aligned} &P(2 W, 1 B)=\left(\frac{3}{4} \times \frac{2}{4} \times \frac{3}{4}\right)+\left(\frac{3}{4} \times \frac{2}{4} \times \frac{1}{4}\right)+\left(\frac{1}{4} \times \frac{2}{4} \times \frac{1}{4}\right) \\ \end{aligned}

\begin{aligned} &=\frac{18}{64}+\frac{6}{64}+\frac{2}{64} \\ &=\frac{26}{64} \\ &=\frac{13}{24} \end{aligned}

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