Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • Provide Solution For R.D. Sharma Maths Class 12 Chapter 30 Probaility Exercise Multiple Choice Questions Question 29 Maths Textbook Solution.

Provide Solution For  R.D. Sharma Maths Class 12 Chapter 30 Probaility  Exercise Multiple Choice Questions Question 29 Maths Textbook Solution.

Answers (1)

Answer: (b)

Hint: You must know the rules of finding probability.

Given: \begin{aligned} &P(A \cup B)=\frac{4}{5^{\prime}} P(B)=\frac{3}{5}, P\left(\frac{A}{B}\right)=\frac{1}{2} \\ \end{aligned}

Solution:\begin{aligned} &P(B)=\frac{3}{5}, P\left(\frac{A}{B}\right)=\frac{1}{2} \end{aligned}

\begin{aligned} &\frac{P(A \cap B)}{P(B)}=\frac{1}{2} \\ &P(A \cap B)=\frac{1}{2} \times \frac{3}{5} \\ &P(A \cap B)=\frac{3}{10} \end{aligned}

Now,

\begin{aligned} &P(A \cup B)=\frac{4}{5} \\ &P(A)+P(B)-P(A \cap B)=\frac{4}{5} \\ \end{aligned}

\begin{aligned} &P(A)+\frac{3}{5}-\frac{3}{10}=\frac{4}{5} \\\\ &P(A)=\frac{4}{5}+\frac{3}{10}-\frac{3}{5} \\\\ &P(A)=\frac{8+3-6}{10} \\\\ &P(A)=\frac{5}{10}=\frac{1}{2} \end{aligned}

Posted by

infoexpert21

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

CBSE Exam Date 2027 Highlights: Class 10, 12 exam dates soon on cbse.gov.in; private candidate form
anam-khan

CBSE 10th, 12th board exam schedule 2027: Sample papers, passing marks
anam-khan

CBSE Date Sheet 2027 LIVE: Class 10, 12 board exam schedule soon; passing marks, paper pattern

Latest Question