Question

The ratio of red to blue to green marbles in a bag is 3 : 10 : 4. If there are 39 red and blue marbles altogether, how many green marbles are there?

Answer 1

Answer:

12

Step-by-step explanation:

The ratio of red to blue to green marbles in a bag is 3 : 10 : 4

3x + 10x = 39

13x = 39

x = 3

3x : 10x : 4x

9 : 30 : 12

there are 12 green marbles