7

Set 5: Ratios Rates Proportions (Beginner)

Explanation

Answer: D

PROBLEM

If x:y = 5:3 and x = 20, find y.

If x:y = 5:3 and x = 20, find y.

A.

13

B.

14

C.

9

D.

12

✓ Correct

Detailed Explanation

Choice D is the best answer. x/y = 5/3. 20/y = 5/3. y = 20 times 3/5 = 12

Why others are wrong:
A: 13 is incorrect because it does not satisfy the equation.
B: 14 is incorrect because it does not satisfy the equation.
C: 9 is incorrect because it does not satisfy the equation.