Set 1: Ratios Rates Proportions (Advanced)

**Choice A is the best answer.** First substance = 5/(5+2) times 35 = 5/7 times 35 = 25 liters

Explanation

Answer: A

PROBLEM

A mixture is made of two substances in the ratio 5:2. If the total mixture is 35 liters, how many liters is the first substance?

✓ Correct

Detailed Explanation

Choice A is the best answer. First substance = 5/(5+2) times 35 = 5/7 times 35 = 25 liters

Why others are wrong:

B: 26 is incorrect because it does not satisfy the equation.

C: 24 is incorrect because it does not satisfy the equation.

D: 22 is incorrect because it does not satisfy the equation.