Question

The ratio of blue marbles to redmarbles in a bag is 11:9. If there are 99 blue marbles, in the bag, how many red marblesare there?

Answer 1

`Radio:11:9\\ 11--99\\ \ 9--x\\ x=(9)/(11)*99=81`

Answer 2

`ratio=11:9`

`11:9=99:x`

`11x=891`

`(11x)/(11)=(891)/(11)`

`x=81`

There are eighty-one marbles.