The average of 11 numbers is 60. if the average of first 6 numbers is 58 and that of last 6 is 63 then the 6 number is

2
then the sixth number will be 66
as 378-312=66
hey sweety Sixth Number is 64 !!!
it will be sum of first six numbers + sum of last six numbers - sixth number = sum of 11 numbers!!

Answers

2014-07-02T12:26:04+05:30
The 6th no. is 5.........................................................
0
its an wrong answer
pls mark as answer as best
options are 66 , 66.5 , 62, 65
the sixth number is 64 !!! please see below my solution !!! Thank You!!!!
  • Brainly User
2014-07-02T13:52:33+05:30
The average of 11 numbers is 60. if the average of  first 6 numbers is 58 and that of last 6 is 63 then the 6 number is

Solution :
             Average of 11 Numbers = 60
  Therefore , sum of 11 numbers = 11*60= 660
         Let the 6th number = x
         Average of first 6 numbers = 58
               Sum of first 6 numbers = 6*58
= 348                                                
Average of Last 6 Numbers = 63
         Sum of Last 6 Numbers = 6*63= 376

Therefore ,
             Sum of first 6 numbers + sum of last 6 numbers  -  6th Number = sum of 11 Numbers
             348 + 376 - x  = 660
               or x = 348 + 376 - 660
                      =724 - 660
                       x= 64

Hence sixth Number = 64 

Hope this helps you!!

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Thank You!!!

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