In a manufacturing plant that creates electronic circuit boards, 5.0 percent of all boards produced are identified as defective and are fixed prior to sale, but 20 percent of all defective boards are sold without repair. What percentage of the total boards produced in the plant are defective?

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5.00%

6.25%

Correct

7.50%

15.00%

20.00%

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In a manufacturing plant that creates electronic circuit boards, 5.0 percent of all boards produced are identified as defective and are fixed prior to sale, but 20 percent of all defective boards are sold without repair. To find the total percentage of defective boards produced: 1. 20% of defective…

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What this question tests

What it tests

Your ability to convert between fractions, ratios, and decimals and to reason proportionally.

Common trap

Cross-multiplying incorrectly or mixing up the ratio parts — a part:part ratio is not a fraction of the whole.