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30 September, 03:55

Genevieve is buying a car audio system that consists of a stereo, speakers, and amplifiers. She is choosing between 5 types of stereos and 2 types of amplifiers. If she has a total of 30 choices, how many types of speakers must there be?

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  1. 30 September, 06:58
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    The correct answer for this question is this one: Speakers = 23.

    Given the facts presented above,

    The car audio system consists of a stereo, speakers, and amplifiers.

    She is choosing between 5 types of stereos and 2 types of amplifiers.

    If she has a total of 30 choices, then we have

    30 = Speakers + Stereos + Amplifiers

    30 = Speakers + 5 + 2

    30 = Speakers + 7

    Speakers = 30 - 7

    Speakers = 23.
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