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Frequency tables with equal class intervals problem 4

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A city planner counted the number of floors per building in the downtown area, and the result is shown below.

11 20 10 10 16 13 21 24 12 17 17 17 24 22 26 32 29 27 20 33

The data above are grouped in the frequency table below.

Floors per building

How many buildings have more than 24 floors?

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