30 students in class b did the same science exam.
Mathematics, 19.11.2019 21:31 Jalenmiller492
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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25 students in class a did a science exam.
30 students in class b did the same science exam.
30 students in class b did the same science exam.
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