There are 378 students in a school. There are 6 times as many boys as girls. How many girls are there?

Answer 1

you need to think there are 7 parts here,6 boys and 1 girl so it is like dividing 378 in 7 because;

girl+boy=378

boy=6girl

girl+6girl=7 girl

378/7=54

54 girl

54*6=324 boys --------------other way 378-54=324 boys

Answer 2

Let's let the variable g represent the number of girls and the variable b represent the number of boys.

Since there are 378 students in the school, we can write: g + b = 378

Then to show that there are 6 times as many boys as girls, we can write: b = 6g

Now we can substitute 6g in the first equation for b and determine the number of girls:

g + b = 378

g + 6g = 378

7g = 378

7g/7 = 378/7

g = 54 girls

Then the number of boys will be 378 - 54 OR 324 boys.