Quantitative Aptitude – Chain Rule
Use chain rule to relate variables via intermediate ratios.
1. Core Concept
If A:B = x and B:C = y, then A:C = x×y.
2. Applications
3. Quick Tips
4. Common Errors
5. Revision Checklist
Summary: Multiply sequential ratios to find indirect relations; treat units as variables, cancel consistently, and simplify final ratio.