a student has to be kar one is filled with hot water and other with cold water He is asked to drop the Crystal of CU S o4 in each beaker after sometimes what he will observe
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गThe marks by 100 students in an examination given below: Marks: 30-35 35-40 40-45 45-50 50-55 55-60 60-65 Number of Students: 14 16 28 23 18 8 3 Find the mean marks of the students.
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