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26 March, 18:02

2/3 of the beads in a box are red 1/4 are yellow and the rest are blue. There are 42 more red beads than blue beads. How many beads are there altogether?

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  1. 26 March, 18:52
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    The fraction of blue beads is 1 - 2/3 - 1/4 = 1/12

    If the total number of beads is t then

    red - blue = 42

    2t/3 - t/12 = 42

    therefore

    7t/12 = 42

    therefore

    t = 12x42/7 = 72
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