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A bag contains 5 white and 7 black balls...

A bag contains 5 white and 7 black balls,3 balls are drawn at random.Find the probability that (i)all are white,(ii)one white and two black.

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The correct Answer is:
`(1)/(22)`,(21)/(44)`
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PREMIERS PUBLISHERS-INTRODUCTION TO PROBABILITY THEORY-PROBLEMS FOR PRACTICE (ANSWER THE FOLLOWING QUESTIONS)
  1. When a pair of balanced dice are rolled .What are the probability of ...

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  2. A cricket club has 15 members, of whom only 5 can bowl . What is the p...

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  3. Four coins are tossed once,find the probabiity of getting(i)exactly tw...

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  4. A bag contains 5 white and 7 black balls,3 balls are drawn at random.F...

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  5. In a box containing 10 bulbs, 2 are defective. What is the probability...

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  6. P(A)=0.35,P(B)=0.73,P(AcapB)=0.14,find P(barAcapB),P(AcupB),P(barAcupb...

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  7. A card is drawn at random from a well shuffled pack of 52 cards. Find ...

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  8. The probability of a boy getting admission is IIT is 0.16 and probabil...

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  9. P(A)=0.5,P(B)=0.6,P(AcapB)=0.24.show that P(barAcapB)+P(AcapbarB)=0.62

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  10. A dice is thrown twice. Let A and be the event ,First dice shows 5 and...

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  11. The probability that student will get an reward for sports is 0.38 and...

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  12. If P(A)=0.4,P(B)=0.5,P(AcapB)=0.25,find P(barA//B)+P(barB//A).

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  13. Two cards are drawn from a pack of 52 cards is succession. Find the pr...

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  14. A speaks truth in 95% cases and B speaks truth in 90% cases. In what p...

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  15. A husband and wife appar in an interview for two vacancies in the same...

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  16. A problem is Mathematics is given to three sutdents whose chance of so...

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  17. The probability of A,B,C hitting a target are (4)/(5),(3)/(4),(2)/(3) ...

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  18. An urn contains 8 white and 5 black balls while another urn contains 5...

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  19. Goods are sold is 3 retail outlets,X Y,Z in the ratio 2:3:5. If 90% of...

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  20. Three urns containing red and white chips are as follows Urn I:6red an...

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