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Aptitude Topics

Basic Average

An average, or arithmetic mean, represents the central value of a finite set of numbers.

Fundamental Principles

Arithmetic Mean

The sum of all values divided by the total number of values in the dataset.

Essential Formulation Tips

  • Ensure you count the total number of items accurately.
  • If all quantities are equal, the average is simply that quantity itself.

Shortcut Execution Techniques

  • The average of an arithmetic progression (AP) with an odd number of terms is always the middle term.
  • For consecutive numbers, the average is (First Term + Last Term) / 2.

Contextual Inquiries (FAQs)

Q: Can an average be negative?

A: Yes, if the sum of the elements is negative, the average will be negative.