TRICKS TO SOLVE QUESTIONS OF "AVERAGE" -DHIRAJ SINGH CHAUHAN
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CGL Mains 2014 (Similar question) O ll Aerage o f nd tieis d from eaeo Q-11. Average of 10 different numbers is 5. If all the numbers are multiplied by 5 and then 4 is decreased from each one. Find the new average. SOI-Average = S . Sol-Average = 55-4 = 21
More hard Nuts Q,-12-Ram covered one third of a journey at 25 kmph, one fourth of it at 30 kmph and remaining distance at 50 kmph. Find the average speed during the whole journey.
3 Total Distanci Total time Average steed. 1200 km I 200 you Du 30- 500 3 0 u 25 3 0 =1200 36
Using Mixture and Alligation Q-13-Average of marks obtained by 120 candidates in an exam is 35. if average marks of all successful candidates is 39 and average of all failure candidates is 15. find the number of successful candidates. Fail 15 .Sol- Pass 39 35 20 4 Ratio-L5 1-6