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  • Please Solve R.D.Sharma class 12 Chapter 30 Probaility Exercise 30.5 Question 1 Maths Textbook Solution.

Please Solve R.D.Sharma class 12 Chapter 30 Probaility  Exercise 30.5 Question 1 Maths Textbook Solution.

Answers (1)

Answer:\frac{14}{27}

Hint: You must know the rules of finding probability

Given: Bag 1 – 3 white & 6 black balls

Bag 2 – 5 black & 4 white balls

Solution:

Bag 1=\left ( 3W+6B \right )=9balls

Bag 2=\left ( 5B+4W \right )=9balls

P\left (balls\: of\: same\: colour\: are\: drawn \right )=P\left ( both\: black \right )+P\left ( both\: white \right )

\begin{aligned} &=\left(\frac{6}{9} \times \frac{5}{9}\right)+\left(\frac{3}{9} \times \frac{4}{9}\right) \\ &=\frac{30}{81}+\frac{12}{81} \\ &=\frac{42}{81} \\ &P=\frac{14}{27} \end{aligned}

 

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