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An urn contains 7 white, 5 black and 3 r...

An urn contains 7 white, 5 black and 3 red balls. Two balls are drawn at random, Find the probability that :
both the balls are red.

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MODERN PUBLICATION-PROBABILITY -EXERCISE
  1. A urn contains 9 red, 7 white and 4 black balls. A ball is drawn at ra...

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  2. A urn contains 9 red, 7 white and 4 black balls. A ball is drawn at ra...

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  3. An urn contains 7 white, 5 black and 3 red balls. Two balls are drawn ...

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  4. An urn contains 7 white, 5 black and 3 red balls. Two balls are drawn ...

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  5. An urn contains 7 white, 5 black and 3 red balls. Two balls are drawn ...

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  6. An urn contains 9 red, 8 white and 4 black balls. A ball is drawn at r...

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  7. A bag contains 9 discs of which 4 are red, 3 are blue and 2 are yelow....

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  8. A bag contains 9 discs of which 4 are red, 3 are blue and 2 are yelow....

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  9. A bag contains 9 discs of which 4 are red, 3 are blue and 2 are yelow....

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  10. A bag contains 9 discs of which 4 are red, 3 are blue and 2 are yellow...

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  11. A bag contains 9 discs of which 4 are red, 3 are blue and 2 are yellow...

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  12. A bag contains 9 discs of which 4 are red, 3 are blue and 2 are yelow....

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  13. Two coins are tossed simultaneously. Complete the following table :

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  14. Two dice are tossed simultaneously. Complete the following table :

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  15. Three coins are tossed simultaneously. Write the sample space and comp...

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  16. A urn contains 9 red, 7 white and 4 black balls. A ball is drawn at ra...

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  17. A urn contains 9 red, 7 white and 4 black balls. A ball is drawn at ra...

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  18. A urn contains 9 red, 7 white and 4 black balls. A ball is drawn at ra...

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  19. A urn contains 9 red, 7 white and 4 black balls. A ball is drawn at ra...

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  20. A urn contains 9 red, 7 white and 4 black balls. A ball is drawn at ra...

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