25 students in class A did a science exam.
30 students in class B did the same science exam.
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Mathematics, 05.04.2021 17:00 gungamer720
25 students in class A did a science exam.
30 students in class B did the same science exam.
The mean mark for the 25 students in class A is 67.8.
The mean mark for all the 55 students is 72.0.
Work out the mean mark for the students in class B.
Answers: 3
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