The average of 11 results is 60. if the average of first 6 results is 58 and that of the last 6 is 63, find the 6th result?
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the avarage of 11 digits is 60 so the sum of 11 digits is 11×60 = 660
the avarage of first 6 digits is 58 so the sum is
348
the avarage of last 6 digits is 63 so the sum is
378
but here the 6th digit is added in both so if we add the first 6 and the last 6 and subtract the sum of whole we can get the 6th one
348+378-660 = 68
the avarage of first 6 digits is 58 so the sum is
348
the avarage of last 6 digits is 63 so the sum is
378
but here the 6th digit is added in both so if we add the first 6 and the last 6 and subtract the sum of whole we can get the 6th one
348+378-660 = 68
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