the mean marks 50 students were 40 and mean marks of 100 students of another class were 50 find the mean marks of all the students taken as a single unit
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total marks of 50 student=50*40=2000
total marks of 100 student=100*50=5000
mean marks of all the students=(2000+5000)/150=46.666=47
total marks of 100 student=100*50=5000
mean marks of all the students=(2000+5000)/150=46.666=47
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