Find the best tutors and institutes for IBPS Exam Coaching

Find Best IBPS Exam Coaching

Please select a Category.

Please select a Locality.

No matching category found.

No matching Locality found.

Outside India?

Search for topics

Shortcuts For Aptitude : (Topic - Average)

Nirmal Kumar R
02/08/2017 0 0

Important Things To Remember:

  • Replacement case:

Weight of new person =  Weight of outgoing person  + No of person (inc in average)

Weight of new person = Weight of outgoing person  -  No of person (dec in average)

  • Non replacement case:

Teacher age = Existing average + Total no of new persons (inc in average)

Teacher age = Existing average - Total no of new persons (dec in average)

  • Diff of first & last no = Difference in Average * (Total no of sample-1)
  • Correct average = Existing average ± (Diff in value/Total no of observation)
  • If average of some numbers is “x” and a constant number is added to each term of the series, then new average is = x+a. Similarly calculate you can find new average when subtraction, multiplication and division to each term of the series is given.
  • Average = Sum of observations / no of observations.
0 Dislike
Follow 1

Please Enter a comment

Submit

Other Lessons for You

Permutation and Combination
Fundamental Principle of Counting/Multiplication rule Q1) How many numbers greater than 999 but not greater than 5000 be formed using the digits 0,1,2,3,4 and 5 if (a) repetition of digits is allowed...

Atul M | 11/06/2018


Series
INTRODUCTION Questions on series are now extremely common in all the Prelims and Mains exams. They are generally of three types – number, letter and alphanumeric – but the most commonly...

Three Digit Multiplication Shortcut
1) 123*456 I II III 1 2 3 4 5 6 Multiply column III. Here, it's 18. Write 8 and carry over 1. Result=>__8 Cross multiply column II and III diagonally. ie 2*6 and 3*5. We get 12...

Mahadev | 16/01/2018

2 0
0

Profit & Loss
Profit and Loss Cost Price (CP): The price at which any article is purchased Selling Price (SP): The price at which an article is sold Profit or Gain: Profit is the difference between S.P. and...

Ramesh S | 30/06/2017

0 0
0

Fast Calculations In Mathematics: (Multiplication Module 1: Part a - Multiplication By 11)
Multiplication Of Any Two-Digit Number (Let Say Ab) By 11: A) WHEN (A+B) IS BETWEEN 0 TO 9: A (A+B) B EXAMPLES: 1) 11 X 42 = 4 ( 4+ 2) 2 = 462 ...

Anshuman Singh | 03/06/2017

1 0
0

Looking for IBPS Exam Coaching ?

Find best IBPS Exam Coaching in your locality on UrbanPro.

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you
Sponsored

Find Best IBPS Exam Coaching ?

Find Now »

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 25 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 6.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more