Array
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    [3] => 3month_bills.gif
    [4] => 5_dice_10000.gif
    [5] => ABindependent.gif
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    [8] => Corp_Fin_Ross.jpg
    [9] => Outcome_Y.xls
    [10] => US_stock_market.xls
    [11] => XYdependent.gif
    [12] => XYdependent2.gif
    [13] => balance_sheet.gif
    [14] => continuous_distribution.gif
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    [37] => indices_s.gif
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    [39] => interest_6.gif
    [40] => mathematica_online.gif
    [41] => normal.gif
    [42] => one_minus_epsilon.gif
    [43] => outcomes_Y.gif
    [44] => profit_1.gif
    [45] => profit_2.gif
    [46] => random_chinese.jpg
    [47] => rectangle_and_square.gif
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    [49] => scatter2.GIF
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    [53] => wheel_of_chance.gif
    [54] => wheel_of_chance2.gif
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