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The table shows the number of wheels on auto-rickshaws parked at a stand. Which rule gives the wheels for n autos?

Class 7Formulas and Rules from PatternsAlgebra
  • An + 3
  • B
  • C
  • D

Step-by-Step Solution

1 → 3, 2 → 6, 3 → 9, 4 → 12. The wheels go up by 3 for each auto and are always 3 × (number of autos): .
Answer: C)

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