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A bag contains 7 red, 4 white and 5 blac...

A bag contains 7 red, 4 white and 5 black balls. If four balls are drawn one by one the replacement, what is the probability that
only two are white?

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PRADEEP PUBLICATION-PROBABILITY-EXERCISE
  1. A lot of 100 watches is known to have 10 defective watches. If 8 wath...

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  2. A pair of dice is thrown 7 times if getting a total of 7 is considered...

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  3. A bag contains 7 red, 4 white and 5 black balls. If four balls are dra...

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  4. If getting '5' or '6' in a throw of an unbiased dice is a success and ...

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  5. A bag contains 4 white and 7 black and 5 red balls. 4 balls are drawn ...

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  6. The sum of mean and variance of a binomial distribution is 18 and sum ...

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  7. A box contains 100 tickets each bearing one of the numbers from 1 to 1...

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  8. An urn contains 25 balls of which 10 balls bear a mark 'X' and the rem...

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  9. An urn contains 25 balls of which 10 balls bear a mark 'X' and the rem...

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  10. An urn contains 25 balls of which 10 balls bear a mark 'X' and the rem...

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  11. An urn contains 25 balls of which 10 balls bear a mark 'X' and the rem...

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  12. A factory produces bulbs. The probability that any one bulb is defecti...

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  13. A factory produces bulbs. The probability that any one bulb is defecti...

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  14. A factory produces bulbs. The probability that any one bulb is defecti...

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  15. A factory produces bulbs. The probability that any one bulb is defecti...

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  16. What is the probability of sure event ?

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  17. The probability of an impossible event is

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  18. What is the number of sample points in a simple event associated with ...

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  19. If E1, E2, E3 are mutually exclusive and exhausive events then what is...

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  20. If E is an event associated with an experiment, find the value of P(E)...

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