Answer:
3 :4
Step-by-step explanation:
Remember that odds are different than probability
favor : not in favor ( drawing something other than white)
9 white : 12 not white
Divide each by 3
9/3 : 12/3
3 :4
Since we are drawing a white marble, this number goes before any other color in the ratio;
9 white marbles to 12 green marble or 9:12
Simplify the ratio:
9:12
9/3:12/3
3:4
This can't be simplified anymore.
Therefore, the answer is [ B. 3:4 ]
Best of Luck!