The rotio of blue marbles to red marbles in a bag is 11:9.If there are 99 blue marbles in the bag how many red marbles are there

Answer:
81
Step-by-step explanation:
let the number of blue and red marbles be 11x and 9x res
pectively
then,
11x=99
x=99/11
x=9
so
no. of red marbles= 9x=9×9=81