SATHEE: Probability 2 Question 12

Probability 2 Question 12

12. If the probability for $A$ to fail in an examination is 0.2 and that of $B$ is 0.3 , then the probability that either $A$ or $B$ fails is 0.5 .

$(1989, 1 M)$

Analytical and Descriptive Questions

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Answer:

Correct Answer: 12. $P (A \cap B)$

Solution:

Given, $P$ ( $A$ fails in examination $) = 0.2$

and $P (B$ fails in examination $) = 0.3$

$\begin{aligned} P (A \cap B) & = P (A) P (B) = (0.2) (0.3) \\ P (A \cup B) & = P (A) + P (B) - P (A \cap B) \\ = 0.2 + 0.3 - 0.06 = 0.44 \end{aligned}$

Hence, it is a false statement.

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Probability 2 Question 12

12. If the probability for $A$ to fail in an examination is 0.2 and that of $B$ is 0.3 , then the probability that either $A$ or $B$ fails is 0.5 .

Analytical and Descriptive Questions

Answer:

इंजीनियरिंग की तैयारी

चिकित्सा तैयारी

एनसीईआरटी पुस्तकें और समाधान

महत्वपूर्ण संसाधन

अन्य संसाधन

पाठ्यक्रम

परीक्षा मंच

नमूना मॉक टेस्ट

सदस्यता

एनसीईआरटी व्यायाम वीडियो समाधान

Probability 2 Question 12

12. If the probability for A to fail in an examination is 0.2 and that of B is 0.3 , then the probability that either A or B fails is 0.5 .

Analytical and Descriptive Questions

Answer:

इंजीनियरिंग की तैयारी

चिकित्सा तैयारी

एनसीईआरटी पुस्तकें और समाधान

महत्वपूर्ण संसाधन

अन्य संसाधन

पाठ्यक्रम

परीक्षा मंच

नमूना मॉक टेस्ट

सदस्यता

एनसीईआरटी व्यायाम वीडियो समाधान

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12. If the probability for $A$ to fail in an examination is 0.2 and that of $B$ is 0.3 , then the probability that either $A$ or $B$ fails is 0.5 .