Question 811619
A girl to boy ratio is 6 to 10. In a geometry class there are 30 girls, how many boys are there?
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To figure out how many boys there are if there are 30 girls, you divide 30 by 6 and you get 5. Now we can multiply the original ratio by 5. 6*5:10*5=30girls:50boys. Therefore there are 50 boys in the geometry class if there are 30 girls. 
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Cheers, 
Muhammad Khan