Question

there are 20boys, 10 girls in a class the mean of 20 boys is 35 and mean of 10 girls is 40.Find mean of total class​

Answer 1

Step-by-step explanation:

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Total no.of boys and girls= 20+10=30

Mean sum of them= 35+40=75

sum of Boys =20×35=700

Sum of girls=10×40=400

Mean of total class= 1100/30

=110/3

=36.666

=37( Round off answer)

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Answer 2

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Total no.of boys and girls= 20+10=30

Mean sum of them= 35+40=75

sum of Boys =20×35=700

Sum of girls=10×40=400

Mean of total class= 1100/30

=110/3

=36.666