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there are six red balls and nine blue balls in a box.a ball is selected at random.find the probability that the ball is (a)red(b) blue ( c) red of blue

  • maths -

    6 red
    9 blue
    total is 15

    prob(red) = 6/15 = 2/5
    prob(blue) = 9/15 = 3/5

    I assume that is a typo and should say "red or blue"
    prob(red or blue) = 1

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