Question

A bag holds 28 blue marbles and 49 red marbles. What is the ratio of red marbles to the total number of marbles in the bag?

Answer 1

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)

Answer 2

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.