If the ratio of x to y is 3:4 and the ratio of y to z is 6:5, what is the ratio of x to z?

✓ Correct Answer: Option A

Make the y-term common: x:y = 3:4 = 9:12. y:z = 6:5 = 12:10. Thus, x:y:z = 9:12:10. So the ratio x:z is 9:10.