1:4. The red marbles are an unnecessary complication. who wouldwanna take the time to actually think thru this question...
Four. The answer will be 12 to 6 which reduced is 2 to 1.
25 marbles = 7 blue + 4 green + 8 red + 6 yellow The ratio of blue to yellow marbles is 7:6
Set up the problem as: y=number of yellow marbles & 4y=number of blue marbles. 40=y+4y or 40=5y or y=8. Therefore number of blue marbles is 4*8 = 32.
If there are 20 red marbles and 40 blue marbles, the ratio of red to blue is 1 over 2. The number of white marbles does not matter.
12 blue marbles
12 blue marbles
9:10
6
24
24 red marbles
Use this formula - 100 * red / (blue+red+yellow).
5 becaese you will get blue