Mathematics, 09.04.2020 19:30, suiani8

The average marks of the first 10 students are 17 and that of the next 15 students is 18. find the mean of 25 students?
can u give the explanation pls like step by step

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The average marks of the first 10 students are 17 and that of the next 15 students is 18. find the m...