The data given below is information of a class of 20 students. A surprise test was conducted after the vacation by the teacher. Teacher want to test the knowledge of students and also want to teach that one should always remember for the test in life. Read the information and answer the given questions: Marks (X) No.of Student Less than 20 8 20-30 4 30-40 3 40-50 3 50 and above 2
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