Section: Math

94) A dish is cooked with the secret ingredients A, B, and C mixed in the ratio 2:3:5, respectively, by weight. How many pounds of secret ingredient A are in a 42-pound (net weight) bucket of the cleaner? 

1. 8.4
2. 12.6
3. 21
4. 42

Answer 1 is correct. 2:3:5=42, or 2x+3x+5x=42, 10x=42, x=4.2. Now sub 4.2 in for x. Ingredient A is 2 in the ratio, so 2(4.2)=8.4.