Math, asked by tadepallisairajesh, 8 months ago

11) The average marks of 20 girls in a class is 80 and 30 boys is 70. Calculate the average marks of class room?

Answers

Answered by kismatwadhwa2005

1

Answer:

the answer can be found out through combined mean formula i.e.

average marks of class room= 20×80+70×30/20+30 = 74

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