Respuesta :

chasemcoy
answer is A because 28+49=77 is the total then ur red marbles ratio is 49:77 which equals 7.11 and that's ur answer A.
  
Lampa20
Total number of marbles in the bag is 28+49=77

Ratio of red in total can be written as:

49/77

We can simplify this by dividing both by 7.
Once we do that we have:
7/11

That means that the answer is A)

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