A, B & C are the amounts invested in shares A, B & C. If no more than 20% of the total investment can be in B, thenYou Answered  B ≤ 0.2   A − 0.8B + C ≤ 0   0.2A − B − 0.2C ≤ 0 Correct Answer  −0.2A + 0.8B − 0.2C ≤ 0

The correct answer is "−0.2A + 0.8B − 0.2C ≤ 0."

Explanation:

The condition "no more than 20% of the total investment can be in B" can be translated into the equation B ≤ 0.2 * (A + B + C).

If we rearrange this equation to bring all terms to one side, we get 0.2A - 0.8B + 0.2C ≥ 0.

However, in standard form for linear programming constraints, inequalities are typically written with a "≤" sign. So, we multiply the entire inequality by -1 to get -0.2A + 0.8B