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There are 10 girls and 20 boys

They take a test
The mean mark for all the class is 70
The mean mark for all the boys is 62
what is the mean mark for the girls

User MinusFour
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1 Answer

1 vote

Answer:

The mean mark for all the girls is 86.

Explanation:

There are 30 students in all.


(20(62) + 10g)/(30) = 70


1240 + 10g = 2100


10g = 860


g = 86

User Farna
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