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4. The following histogram shows the height of students enrolled in a certain class: Frequency 6 5 3 2 Height 50 55 60 65 70

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4. The following histogram shows the height of students enrolled in a certain class: Frequency 6 5 3 2 Height 50 55 60 65 70 75 80 (inches) a) How many students were surveyed? b) What percentage of students are taller than or equal to 70 inches but less than 80 inches? Express your answer in percent form, correct to 2 decimal places. [3 marks] Answers

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