In a test conducted on the three arms of a class, class A with 30 students scored and average of 5.5marks, class B with 25 students scored an average mark of 6.4marks, and class C got an average of 6.25marks. If the average mark for the whole class is 6.0, the number of students in class C is?
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Asked by Mario Ezeh on 29th June, 2020
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