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An instructor has a question bank consis...

An instructor has a question bank consisting of 300 easy true/false questions, 200 difficult true/false questions, 500 easy multiple choice questions and 400 difficult multiple choice questions. If a question is selected at random from the question bank, then what is the probability that it will be an easy question, given that it is a multiple choice questions?

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The correct Answer is:
`5/9`
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ARIHANT PUBLICATION-PROBABILITY-PART I (QUESTION FOR PRACTICE ) SHORT ANSWER TYPE QUESTIONS
  1. If A and B are two events such that P(A) = 0.6, P(B)= 0.5 and P(A nn B...

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  2. A and B are two events. If P(A) = (3)/(8), P(B) = (1)/(2) and P(A nn B...

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  3. A and B are two events. If P(A) = (3)/(8), P(B) = (1)/(2) and P(A nn ...

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  4. If P(A)=2/5,P(B)=3/10 and P(A cap B)=1/5 then find (P(A//B))/(P(B//A...

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  5. If A and B are two events such that P(A)=1/2 P(B) P(B)=1/3 and P(A ...

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  6. If P(B)=3/5,P(A//B)=1/2 and P(A cupB)=4/5 then find P(A cupB)+P(A cap...

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  7. If A and B are two events such that P(A)=1/2, P(B)=1/3 and P(A capB...

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  8. Two integers are selected at random from integers 1 to 11. If the sum ...

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  9. 10% of the bulbs produced in a factory are of red colour and 2% are re...

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  10. In a college, 70% students pass in Physics, 75% students pass in Mathe...

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  11. In a college, 70% students pass in Physics, 75% students pass in Mathe...

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  12. In a college, 70% students pass in Physics, 75% students pass in Mathe...

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  13. An instructor has a question bank consisting of 300 easy true/false qu...

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  14. Assume that each born child is equally likely to be a boy or a girl. I...

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  15. Assume that each born child is equally likely to be a boy or a girl. I...

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  16. Assume that in a family, each child is equally likely to be a boy or a...

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  17. If E, F and G are events in sample space S, with G4 ne phi then prove...

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  18. If E, F and G are events in sample space S, with G4 ne phi then prove...

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  19. If P(A) = 0.4, P(B//A) = 0.3 and P(B^(c)/A^(c)) = 0.2. Find P(B).

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  20. The probability that student will pass the final examination in both E...

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