TEACHER-GUIDE-VERIFIED · TG-V9-083

8. Plan A has 2.4% failure risk and costs 1,800 units. Plan B has 1.2% risk and costs 2,100. Compute extra cost per percentage point of risk reduction.

Verified solution

Solution: Risk reduction=1.2 percentage points. Extra cost=300. Cost per point=300/1.2=250 units per percentage point.

Source: Teacher Guide V9 · English V9. Match the numbers and wording in your printed question before using this solution.

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VIDEO HELP · TG-V9-083

Compare Cost per Percentage Point of Risk Reduction (TG-V9-083)

Plan B costs300 units more and reduces risk by1.2 percentage points. Divide300 by1.2 to get250 units per percentage point; distinguish the absolute difference from50% relative risk reduction.

Space Math Explorers · approved worked example · 1:15 · Watch on YouTube

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These pages reproduce verified solution steps for the registered V9 questions. It does not diagnose learning needs or replace instruction from a qualified teacher or tutor.