Quantitative Aptitude – Average
Average is one of the most important topic in quantitative aptitude. In so many aptitude questions in the exams, you will need to use the formulas of this chapter. So it’s very important to clear all your doubts of this chapter. And those who already know this topic they need to just brush up their knowledge. This will help you in your further chapters.
Here we will discuss all the basics of this topic, and we also show you that how you can use average in your exam. So let’s starts the topic.
What is an Average ?
Definition: An Average is a calculated Central value of a set of Numbers.
Let’s explain this,
Suppose we have a set of numbers, Like,
1, 5, 7, 12, 15, 20
So, if we need to find the central value or mid value of this set of numbers, then we need to add all numbers present in the number set first.
1 + 5 + 7 + 12 + 15 + 20 = 60
So, the sum of all numbers is 60. Now divide 60 with the number of numbers present in the number set, i.e, 6.
Sum of Numbers / Total Number of Numbers = Average
Therefore,
60 / 6 = 10
So, the central value or mid value of 1, 5, 7, 12, 15, 20 is 10.
Arithmetic Mean
In mathematics and statistics an average is called Arithmetic Mean. We all seen average form our school days. After final examination when our teacher showed us our final marks. He or she would get that marks by averaging all the term marks and that marks would be our final marks. Like wise when we calculating our car or bike’s millage we always averaging total run divided by how many liter we put. So, this topic is vary handy in our daily life also.
So, we hope you can now do any kind of problem using the above rule. If you need any farther help on this chapter, then please let us know here in www.AptitudeTricks.com. We will discuss on those problems here later.