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28 September, 21:16

40% of the marbles in the bag are yellow. the rest are orange and green. the ratio of the number of orange to the number of green is 4:5. if there are 30 green Marbles, how many yellow marbles are there?

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  1. 28 September, 21:35
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    Hi ... Try this;

    30/5 = 6

    4x6 = 24 Orange marbles

    30+24 = 54

    If x = total # of marbles

    40/100x = x-54

    40x/100 = x-54

    40x = 100x - 5400

    x = 90

    90-54 = 36 yellow marbles
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