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A bag contains 5 white, 7 red and 8 black balls. Four balls are drawn one by one with replacement, what is the probability that at least one is white?

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RD SHARMA ENGLISH-PROBABILITY-All Questions
  1. A company has estimated that the probabilities of success fro there pr...

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  2. A can solve 90% of the problems given in a book and B can solve 70%. ...

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  3. A bag contains 5 white, 7 red and 8 black balls. Four balls are drawn ...

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  4. If two switches S1a n dS2 have respectively 90% and 80% chances of wor...

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  5. The machine operates if all of its three components function. The prob...

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  6. An anti aircraft gun take four shots at an enemy plane moving away fro...

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  7. An article manufactured by a company consists of two parts X and Y. In...

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  8. To test the quality of electric bulbs produced in as factory, two bulb...

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  9. A bag contains n white and n red balls. Pairs of balls are drawn witho...

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  10. If Aa n dB are two events such that P(A)=0. 5 ,P(B)=0. 6a n dP(AuuB)=0...

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  11. If P(notA)=0. 7 ,P(B)=0.7 a n dP(B//A)=0. 5 , then find P(A//B)a n dP...

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  12. If P" "(A)" "=" "0. 8 , P(B)" "=" "0. 5 and P(B|A)" "=" "0. 4 , find ...

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  13. A fair dice is rolled. Consider the following events: A={1,2,5},B={2,3...

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  14. Three events A , B and C have probabilities 2/5,1/3a n d1/2 respecivel...

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  15. A die is rolled twice and the sum of the numbers appearing on them is ...

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  16. A black and a red dice are rolled. (a)   Find the conditional proba...

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  17. Two integers are selected at random from integers 1 through 11. If the...

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  18. A factory has three machines A, B and C, which produce 100, 200 and 30...

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  19. A company has two plant to manufacture bicycles. The first plant man...

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  20. For A, B and C the chances of being selected as the manager of a firm ...

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