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A room has 4 sockets for electric lamps....

A room has 4 sockets for electric lamps. From a collection of 11 light bulbs of which 6 are good, 4 bulbs are selected at random and put in the sockets. Find the probability that the room does not suffer from a complete black-out.

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The correct Answer is:
`P(A) = 1 - P(A') = 1-1/66 = 65/66.`
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MARVEL PUBLICATION-PROBABILITY-MULTIPLE CHOICE QUESTIONS
  1. A room has 4 sockets for electric lamps. From a collection of 11 light...

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  2. Set of all possible outcomes of an experiment is called its

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  3. If S is the sample space of an experiment, than S must contain

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  4. If S(1),S(2) are the sample spaces of an experiment at the first two t...

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  5. If A an event in a sample space S, then

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  6. If P(A) denotes the probability of an event, then

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  7. Which of the following subsets of a sample space S represents an impos...

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  8. Probability of an impossible event

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  9. Which of the following subsets of a sample space S represents a certai...

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  10. The probability of a certain event is 0 (b) 1 (c) greater than 1...

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  11. A coin is tossed once. Write its sample space.

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  12. If one coin is tossed twice (or two coins tossed once), then the sampl...

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  13. If a coin is tossed three times (or three coins are tossed together...

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  14. If one coin is tossed n times (or n coins tossed once), then the numbe...

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  15. If one die is rolled once, then the sample space is

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  16. If one die is rolled n times (or n dice rolled once), then the number ...

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  17. If s is the total score when two dice are thrown once then

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  18. Indicate the probability of the following events an even number, in ...

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  19. If one die is rolled then find the probability of each of the followin...

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  20. Indicate the probability of the following events a prime number, in ...

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  21. Indicate the probability of the following events a number which is b...

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