Set 2: Ratios Rates Proportions (Advanced)

**Choice B is the best answer.** First substance = 2/(2+5) times 28 = 2/7 times 28 = 8 liters

Explanation

Answer: B

PROBLEM

A mixture is made of two substances in the ratio 2:5. If the total mixture is 28 liters, how many liters is the first substance?

✓ Correct

Detailed Explanation

Choice B is the best answer. First substance = 2/(2+5) times 28 = 2/7 times 28 = 8 liters

Why others are wrong:

A: 9 is incorrect because it does not satisfy the equation.

C: 10 is incorrect because it does not satisfy the equation.

D: 7 is incorrect because it does not satisfy the equation.