On a certain assembly line the rejection rate for hyundai i10's production was 4 percent for hyundai i20's production 8 percent and the two cars combined 7 percent. What was the ratio of hyundai i20's production to hyundai i10's production?
Show answer & explanation
Correct answer: D
Explanation
Let the production of i10 = x
And the production of i20 = y
Combined rejection rate = (4x + 8y) / (x + y) = 7
4x + 8y = 7x + 7y
y = 3x
i20 : i10 = 3x : x = 3 : 1