Mean examination marks in mathematics in three sections are 68, 75 and 72, the number of student being 32, 43 and 45 respectively in these sections. Find the mean examination marks in mathematics for all the three sections taken together.
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Mean of three section are 68,75and 72 and the number of stuends in
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Mean examination marks in mathematics in three sections are 68, 75 and 72, the number of student being 32, 43 and 45 respectively in these sections. Find the mean examination marks in mathematics for all the three sections taken together.
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