Answer:
C. 5
Step-by-step explanation:
Let's assume the weight of the package is x pounds.
We have the equation:
x + 2x + 3x = 15
6x = 15
x = 2.5 pounds
We know the first package weighs twice as much as the second package; it weighs:
2.5 · 2 = 5 pounds
So, the answer is C. 5.