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An urn contains 8 red and 5 white balls....

An urn contains 8 red and 5 white balls. Three balls are drawn at random. Then the probability that balls of both colours are drawn is-

A

`(40)/(143)`

B

`(70)/(143)`

C

`(3)/(13)`

D

`(10)/(13)`

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Knowledge Check

  • An urn contains 9 red, 7 white, and 4 black balls if two balls are drawn at random the probability that both the balls are red is

    A
    (18/95)
    B
    (36/95)
    C
    (18/190)
    D
    none of these

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