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  • Please solve RD Sharma Class 12 Chapter 30 Probability Exercise Case Study Based  Question, question 2 sub question (i) Maths textbook solution.

Please solve RD Sharma Class 12 Chapter 30 Probability Exercise Case Study Based  Question, question 2 sub question (i) Maths textbook solution.

Answers (1)

Answer:

            (d)

Hint:

            You must know rules of conditional probability

Given:

            6% people are left handed with blood group O, and 10% of those with other blood group are left handed 30% of the people have blood group O

Solution:

Probability of selecting a left handed person given that he /she has blood group O

E_1= The person selected is of blood group O

E_2= The person selected is of other than blood group O

E_3= Selected person is left handed

\begin{aligned} &P\left(E_{1}\right)=0.3 \\ &P\left(E_{2}\right)=0.7 \\ &P\left(\frac{E}{E_{1}}\right)=0.06 \\ &P\left(\frac{E}{E_{2}}\right)=0.1 \end{aligned}

P (Left handed person having blood group O)

=P\left(\frac{E}{E_{1}}\right)=\frac{6}{100}=0.06

So, (d) is correct option

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