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20 March, 10:15

Fred has 4 pencils (red, blue, green, and yellow), 3 notebooks (plain, lined, graph), and 9 pieces of chalk (all different colors). He always takes one pencil, one notebook, and one piece of chalk to class.

If he wanted to take a unique combination to class every day, how many days would he be able to do this before he would be forced to repeat one of the combinations?

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  1. 20 March, 10:29
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    If you use the Fundamental Counting Principle, you can figure out the answer.

    4*3*9=108

    There are 108 unique combinations
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