Mathematics · Statistics
The marks obtained by 30 students in a mathematics test are given below: 20, 18, 17, 19, 24, 26, 20, 17, 19, 18, 24, 16, 17, 20, 15, 14, 20, 11, 09, 25, 17, 22, 23, 25, 24, 20, 19, 18, 17, 26 What is the absolute difference between the number of students who obtained less than 20 marks and those who obtained 20 or more marks?
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