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An urn contains 5 red and 5 black balls....

An urn contains 5 red and 5 black balls. A ball is drawn at random, its colour is noted and is returned to the urn. Moreover, 2 additional balls of the colour drawn are put in the urn and then a ball is drawn at random. What is the probability that the second ball is red?

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PSEB-PROBABILITY-Exercise
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  2. Two events A and B will be independent, if:

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  3. An urn contains 5 red and 5 black balls. A ball is drawn at random, it...

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  4. A bag contains 4 red and 4 black balls, another bag contains 2 red and...

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  10. A factory has two machines A and B. Past record shows that machine A p...

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  11. Two groups are competing for the position on the Board of directors of...

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  12. Suppose a girl throws a die. If she gets a 5 or 6, she tosses a coin t...

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  13. A manufacturer has three machine operators A, B and C. The first opera...

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  14. A card from a pack of 52 cards is lost. From the remaining cards of th...

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  15. Probability that A speaks truth is 4/5. A coin is tossed. A reports t...

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  16. If A and B are two events such that AsubB and P(B) ne 0, then which of...

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  17. An urn contains 5 red and 2 black balls. Two balls are randomly drawn....

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  18. Let X represent the difference between the number of heads and the num...

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  19. Find the probability distribution of number of heads in two tosses of ...

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  20. Find the probability distribution of number of tails in the simultaneo...

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