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Examples to understand the concept of Average (in Hindi)
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In order to help you understand the underlying concept of average, Dhiraj solves three questions of different nature in this lesson. Taking you through each step while explaining the reasoning behind it, he ensures that he provides you with a holistic understanding of the subject. Understanding the basics and the techniques are a must for any aspirant.

Dhiraj Singh Chauhan
Income-tax Inspector, Cleared Assistant Commandant(SSB), From Saharanpur

U
Unacademy user
did clue originate from something like 'couple+glue'... just a guess from the hint.
Q4. If the avarage is equally distributed, in his 17th innings also he will get 3 runs extra, ie. 87+3=90. Now the amount which is equally distributed is 17*3=51 His new run rate then would be 90-51=39. Just another way... More satisfying for me... :)
Q4. If the avarage is equally distributed, in his 17th innings also he will get 3 runs extra, ie. 87+3=90. Now the amount which is equally distributed is 17*3=51 His new run rate then would be 90-51=39. Just another way... More satisfying for me... :)
I didn't understand 5th questions last step. how 15/5 came? before birth of youngest member, AVG= 22-7= 15 (n=6) but no of members were originally 5 only. at the birth of youngest member, n=6 then their average may reduce na?
Anoop C
2 years ago
sir, avg of 6 at present=22 avg of 6 seven yrs back=22-7=15 total age of 6 seven yrs back=15*6 but 7yrs back only 5 members then avg=(15*6)/5=18
Rahul Gosam
2 years ago
avg means it distributes to all R8.. then the 15 yrs of that youngest one (who is not born 7 yrs ago ) shouldn't be counted that implies this 15 yrs distributes to 5 mem of family that's where 15+15/5 comes.. hope u understood..
nice sir your lessons are owsome please upload entire ssc sallybus video because ur teaching way is mind blowling
sir ur trics are excellent but taught the lessons in English also.tq
  1. TRICKS TO SOLVE QUESTIONS OF "AVERAGE" -DHIRAJ SINGH CHAUHAN


  2. ABOUT ME B.Sc.(Hons.) from BHU Varansi Income tax Inspector, 27th Rank in CGL 2015 . Tier 1-150/200 Tier 2-347/400 Interview-60/100 . Cracked CPO,CHSL,CDS,AFCAT, IB-ACIO etc Course Fee- Contribute . Follow me on at: https://unacademy.in/user/dhirajaryal


  3. Lets Delve deeper Q.3- Average weight of 4 men is increased by 3 kg when one of them who weighs 120 kg is replaced by another man. Find the age of that new person. Sol.- 120 + 4x3 = 132 kg


  4. New perspective Q,4-A batsman scored 87 runs in 17th innings and therefore, his run-rate increased by 3 runs per match. Find his new run-rate. Sol- 17 3=51 is distributed over all innings. Remaining 87-51 = 36 was his old run rate. And new run rate = 36+3 = 39


  5. .Q.5- average age of a family of 6 members is 22. If age of younger member is 7 years. Then what was the average age of family at birth of youngest member Sol- 7 years ago, Average age of family-22-7-15 years But number of members= 6-1 = 5 So Average age = 15 + 15/5 = 18 years