Aptitude

Clear Your Aptitude Concepts in Detail Including Companies Questions & Sets

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Quantitative

CONCEPT

1

AVERAGE

Importance :

Concept of average is a basic concept of arithmetic and is important to solve many chapters. Specially ‘average’ questions are regularly asked in different competitive exams.

Scope of questions :

Asked questions include Average age, Average income, Average marks/distance, arithmetic means of numbers, increase/decrease in average, minimum/maximum  scope/quantity/number for certain average. Tabulation based/frequency based arithmetic means are also asked.

Concepts:-

Average = Apti Average 1

Sum of quantities = Average ∗ Number of quantities
Number of quantities = Apti Average 2

= Apti Average 3

Average = Ax A x A x x x x n n n 11 2 2 1 2 + + + + + + ……. ……… where, A1 , A2 , A3 . ………. An are frequencies