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1 March, 02:14

The computer accessory that Grace is considering selling at her store comes in white, beige, gray, or black and as an optical mouse, mechanical mouse, or trackball. How many combinations of color and model must she stock in order to have at least one of every possible combination?

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  1. 1 March, 04:29
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    Step-by-step explanation:

    the answer is 12
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