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Need Solution for R.D.Sharma Maths Class 12 Chapter 30 Probability  Exercise 30.5 Question 24 Sub Question 1 Maths Textbook Solution.

Answers (1)

Answer:0.03

Hint:  Probability required =P\left ( A\cap B\cap C \right )

Given:

P\left ( A\: grade\: in\: Maths \right )=0.2=P\left ( A \right )

P\left ( A\: grade\: in\: Physics \right )=0.3=P\left ( B \right )

P\left ( A\: grade\: in\: Chemistry \right )=0.5=P\left ( C \right )

Solution:P\left ( A\: grade\: in\: all\: Subjects \right )=P\left ( A \right )\times P\left ( B \right )\times P\left ( C \right )

=0.2\times 0.3\times 0.5

=0.03

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