Find the original average of boys and girls in the class, Mathematics

When 6 boys were admitted & 6 girls left the percentage of boys increased from 60% to 75%. Find the original no. of boys and girls in the class.

Ans: Let the no. of Boys be x

Girls be y

Total = x + y

APQ:

x/x + y =  60/100  ---------------(1)

x + 6/( x + 6)( y - 6)  = 75/100

On solving we get,

x = 24  and y = 16.

 

 

 

 

Posted Date: 4/8/2013 2:51:45 AM | Location : United States







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