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  • Explain Solution R.D. Sharma Class 12 Chapter 30 Probability Exercise Multiple Choice Questions Question 53 Maths Textbook Solution.

Explain Solution R.D. Sharma Class 12 Chapter 30 Probability  Exercise Multiple Choice Questions  Question 53 Maths Textbook Solution.

Answers (1)

Answer:(c)

Hint: You must know the rules of finding probability.

Given: Two dice are thrown. It is known that sum of number of on dice was less than 6

Solution:

Let

A be the event of getting a sum of 3

B be the event of getting a sum of 6

As,A=\{(1,2),(2,1)\} \text { and } B=\{(1,1),(1,2),(1,3),(1,4),(2,1),(2,2),(2,3),(3,1),(3,2),(4,1)\}

So,n(A)=2, n(B)=10

Now,

\begin{aligned} &P\left(\frac{A}{B}\right)=\frac{n(A \cap B)}{n(B)} \\ &=\frac{2}{10}=\frac{1}{5} \end{aligned}

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