Ononot — In a histogram, the bin [10, 20) has a frequency of 15 and t

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Data Visualizationhard

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In a histogram, the bin $[10, 20)$ has a frequency of $15$ and the bin $[20, 30)$ has a frequency of $25$ . What is the relative frequency of the combined interval $[10, 30)$ if the total frequency is $200$ ?