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At a school the number of boys: number of girls = 11 : 9

there are 124 more boys than girls

work out the total number of students at the school

User Arseniy
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1 Answer

2 votes

b = boys

g = girls


b:g=11:9, b=g+124


b=11g/9

Insert in the second equation


11g/9=g+124

Solve for g


11g=9g+124\cdot9


2g=124\cdot9\implies g=62\cdot9=\boxed{558}

Solve for b


b=g+124=\boxed{682}

Hope this helps.

User Shlomy
by
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