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Quantitative Analysis

Study Notes and Chapters for Quantitative Analysis - Online Preparation for Bank Exams

Introduction

Quantitative Analysis requires a lot of practice and hardwork since its an analytical subject. Before becoming an expert one should understand the basics of Quantitative Analysis for Government Bank Job Exams for SBI, RBI, RRB and IBPS. This section gives you all details about the basics of Quantitative Analysis. Here you can get the Free Notes and PDF downloads for Quantitative Analysis to prepare for the Bank PO and Clerical Jobs in India. Our experts are available incase you need any kind of online help to understand any topic or any kind of doubt clearing

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Quantitative Aptitude Free-Study Notes

6. AVERAGE

 

An average, or an arithmetic mean, is the sum of `n' different data divided by `n'

Average = Sum of Data / No. of Data

No. of Data = Sum of Data / Average

Sum of Data = Average * No. of Data

Points to remember:

1. Age of new entrant = New average + No. of old members x change in average

2. Age of one who left = New average - No. of old members x change in average

3. Age of new person = Age of the removed person + No. of members x change in average

In all the above three cases, if there is a decrease in the average, the sign of change in average will be negative.

4. If a certain distance is covered at x km/hr and the same distance is covered by y km/hr, then the average speed during the whole journey is 2xy / (x+y) km/hr.

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