The formula for this is

. Filling in accordingly,

. This simplifies to

and 36=6x. Therefore, x = 6 so the bases are 6 and 12.
Answer:
28/43
Step-by-step explanation:
The question asks what is the probability that Marley picks out a blue or yellow marble.
In total, there are 43 marbles.
In total, there are 28 blue and yellow marbles. (18+10=28)
So, the answer would be 28/43
Hope this helps