Free Practice Question
PS · Problem Solving
705-805
Fractions/Ratios/Decimals
In a certain industry, production index x is directly proportional to the square of efficiency index y, and indirectly proportional to investment index z. If a business in this industry halves its investment index, which of the following is closest to the percent change in the business’s efficiency index required to keep the production index the same?
Answer Choices
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100% increase
B
50% increase
C
30% increase
D
30% decrease
E
50% decrease
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Difficulty
705-805
Type
PS
Category