Paper I · 9 Logical Reasoning & Analytical Ability · 9.4 Ratio, ages, averages and mixtures

9.4.9 Weighted averages and averages of consecutive numbers

A combined average weights each group by its size; and for numbers in equal steps the average is simply the middle term, which turns most "consecutive numbers" questions into one-line answers.

  • APPSC Paper I · Paper I
  • Standard level
  • 7 min read
  • Full course

Key terms

  • weighted average
  • combined average
  • group sizes by alligation
  • consecutive numbers
  • consecutive odd numbers
  • consecutive even numbers
  • arithmetic progression
  • average of squares

What this note covers

  1. Core factsFoundation
  2. ExplainedStandard
  3. DeeperAdvanced
  4. Common trapsFoundation
  5. Quick revisionFoundation

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