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math

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the bag contains 20 red marbles and30 white marbles and 40 blue ones what is the ratioof red to blue marbles what is the ratio of white to red if one marble is drawn from the bag what is the probability that the marble will not be white??? need ansewr fastt plzz

  • math - ,

    r/b = 20/40 = 1/2
    w/r = 30/20 = 3/2

    (r+b)/(r+b+w) = (20+40)/(20+40+30) = 2/3
    or, 1 - 30/90 = 2/3

  • math - ,

    2/3Y + 1/6 Y+ Y=

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