Question

A sack contains red and blue marbles. The ratio of red marbles to blue marbles is 4:3. If there are 18 blue marbles in the sack, how many red marbles are in the sack?

Answer 1

`r:b=4:3 \\ (r)/(b)= (4)/(3) \\ (r)/(18)= (4)/(3) \\ r= (18*4)/(3) \\ r= 6*4 \\ r=24 \ red \ marbles`