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The numbers 1-10 are written on a sheet of paper and the ten sheets of paper are placed in a bowl. If one sheet of paper is selected at random from the bowl, determine the probability that the number selected is odd. (Points: 1)

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  1. Four red and seven black beans are placed into a bag. If one of the beans is selected at random, determine the odds against the bean being red. (Points: 1)

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  2. aren't there 5 odd numbers form 1 to 10 ?

    so prob is 5/10 or 1/2

    for the second,
    prob of red is 4/11
    prob of black is 7/11

    odds in favour of red = (4/11) : (7/11) = 4 : 7
    so odds against red = 7 : 4

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