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math

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A bucket contains 7 red, 3 blue, 2 black and 1 yellow ball of the same size.
A random selection of 5 balls is taken from the bucket.
find the probability that the random selection will contain atleast 1 red ball?

  • math -

    pr(1 or more red)=1-pr(no red)

    = 1-(6/13)(5/12)(4/11)(3/10)(2/9)

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