Respuesta :

The correct answer is 45

Answer: 45 red marbles

Step-by-step explanation:

Using the ratios, we can create a fraction for the number of marbles.

3/5 of the bag would be red marbles, and 2/5 of the bag would be blue marbles.

(you get the 5 from adding 3+2 together)

If you take 3/5 of 75, you would get 45 red marbles.