In a survey of 400 Latin music downloads in a certain year, 200 were regional (Mexican/Tejano), 100 were pop-rock, 55 were tropical (salsa/merengue/cumbia/bachata), and 45 were urban (reggaeton). Calculate the following relative frequencies. (a) that music download was pop-rock (b) that music download was neither tropical nor regional (c) that music download was not regional HINT [See Example 1.]

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Q: In a survey of 400 Latin music downloads in a certain year, 200 were regional (Mexican/Tejano), 120…

A: a) Given that 120 were pop rock. And total number of music=400So the relative frequency=120400=0.3

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