Question

The ratio of blue marbles to white marbles in a bag is 4 to 5. At this rate, how many blue marbles are there if there are 15 white marbles

Answer 1

12 blue marbles

The ratio of blue to white is 4:5. We know that if we multiple 5 by 3 we get 15 which is the amount of white marbles we have in the equation. So we also take 4 times 3 to get 12 Which is how many blue marbles are in the bag when there are 15 white marbles.

Answer 2

There are 12 blue marbles

Explanation:

Again you would use ratios 4:5 and then it becomes x:15 you multiply 5 by 3 to get 15 so you multiply 4 by 4 to get 12