Answer:
This depends on how many blue and red marbles there are in total.
D) 2/3
Step-by-step explanation:
If you remove 1 red marble then there is 1 marbles left red.
If you add a blue marble then there is 4 blue marbles.
So it is 4/6 and when you simply it is 2/3.
I think its 623
37.50 and 84.97
7*2=14 8x=8*8=64*2
Thats how you basically do it now try it!