Girls

The boys and girls in the class formed without the rest of the fives, 2 girls and 3 boys. There are 6 girls missing to create mixed pairs (1 boy and 1 girl). How many girls are in the classroom?

Correct result:

d =  12

Solution:

d=2n c=3n c=d+6   3 n=2 n+6  n=6  d=2 n=2 6=12



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