Question

There are three sections a b and c a class in a collage. The number of students of these section 50‚ 30 and 20 respectively. The average marks of statistics of these section are 40‚ 45 and 50. You are required to find the combined average of marks statistics.
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Answer 1

combined average marks of statistics= 50*40+ 30*45+ 20*50/50+30+20

= 2000 + 1350 + 1000/ 100

= 4350/100

=43.5