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Urn A contains 6 red and 4 black balls a...

Urn A contains 6 red and 4 black balls and urn B contains 4 red and 6 black balls. One ball is drawn at random from urn A and placed in urn B. Then, one ball is drawn at random from urn B and placed in urn A. If one ball is drawn at random from urn A, the probability that it is found to be red, is....

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A DAS GUPTA-Elementary Probability-Exercise
  1. Two numbers are selected at random from 1,2,3,....100 and are multipli...

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  2. Three dice are thrown simultaneously. The probability of obtaining a s...

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  3. Urn A contains 6 red and 4 black balls and urn B contains 4 red and 6 ...

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  4. A and B are two events such that the probability that both A and B occ...

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  5. The probabilities that on a certain day the two trains from Calcutta a...

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  6. If four whole numbers taken art random are multiplied together, the...

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  7. Three six-faced dice are thrown together. The probability that the sum...

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  8. Four small squares on a chessboard are selected at random. The probabi...

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  9. A coin is tossed three times. The probability of getting head and tail...

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  10. A room contains 3 sockets for bulbs. If from a collection of 10 bulbs,...

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  11. A bag contains 17 markers with numbers 1 to 17 . A marker is drawn at ...

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  12. Five persons entered the lift cabin on the ground floor of an 8 flo...

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  13. A card is drawn at random from a pack of 52 cards. The chance that it ...

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  14. P(A cup B)=P(A cap B) if and only if the relation between P(A) and P(B...

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  15. India plays two matches each with West Indies and Australia. In any ma...

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  16. If x denotes the number of sixes in four consecutive throws of a dice,...

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  17. Let an ordinary coin be tossed 15 times. If Pr denotes the probability...

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  18. Two coins are tossed 4 times. The chance that there will be equal numb...

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  19. The probability that an event A happens in one trial of an experiment,...

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  20. The odds in favour of A winning a game against B are 4 : 3. The probab...

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