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  • Provide Solution For R.D. Sharma Maths Class 12 Chapter 30 Probaility Exercise 30.5 Question 12 Maths Textbook Solution.

Provide Solution For  R.D. Sharma Maths Class 12 Chapter 30 Probaility  Exercise 30.5 Question 12 Maths Textbook Solution.

Answers (1)

Answer:\frac{4}{45}

Hint: You must know the rules of finding probability functions.

Given: Tickets are number from 1 to 10

Two tickets are drawn one after the other at random.

Solution: We know 5 and 10 are multiples of 5 while 4 and 8 are multiples of 4

\begin{aligned} &P(\text { Multiple of } 5)=\frac{2}{10}=\frac{1}{5} \\ &P(\text { Multiple of } 4)=\frac{2}{10}=\frac{1}{5} \end{aligned}

P(Multiple\: of \: 5\: and \: multiply \: of \: 4)=P( multiple\: of \: 5 \: on \: first and \: multiple \: of \: 4 \: on \: second)+

P(multiple of 4 on first and multiple of 5 on second)

\begin{aligned} &=\left(\frac{2}{10} \times \frac{2}{9}\right)+\left(\frac{2}{10} \times \frac{2}{9}\right) \\ \end{aligned}      \left [ without\: replacement \right ]
 

\begin{aligned} &=\frac{4}{90}+\frac{4}{90} \\ &=\frac{8}{90} \\ &=\frac{4}{45} \end{aligned}

 

 

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