Answer :
[tex]ratio=11:9[/tex]
[tex]11:9=99:x[/tex]
[tex]11x=891[/tex]
[tex]\frac{11x}{11}=\frac{891}{11}[/tex]
[tex]x=81[/tex]
There are eighty-one marbles.
[tex]11:9=99:x[/tex]
[tex]11x=891[/tex]
[tex]\frac{11x}{11}=\frac{891}{11}[/tex]
[tex]x=81[/tex]
There are eighty-one marbles.