Answer:
The answer to your question is the letter C. 4/9
Explanation:
Data
Total number of marbles = 9
Number of blue marbles = 2
Number of green marbles = 3
Number of red marbles = ?
Process
1.- Calculate the number of red marbles
Number of red marbles = 9 - 2 - 3
Number of red marbles = 9 - 5
Number of red marbles = 4
2.- Divide the number of red marbles by the total number
4/9