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Calculation Mistake (Posted on 2003-11-19) Difficulty: 2 of 5
A boy was asked to calculate the arithmetic mean of ten positive integers each of which had 2 digits.
By mistake, he interchanged the two digits, a & b, in one of these ten integers. As a result, his answer for the arithmetic mean was 1.8 more than what it should have been.
Find the value of b-a.

See The Solution Submitted by Ravi Raja    
Rating: 2.2857 (7 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionPuzzle SolutionK Sengupta2007-09-30 05:49:06
Some Thoughtsre: a short oneJustin2005-05-21 02:02:28
a short oneMike2003-11-20 07:23:52
solutionwonshot2003-11-19 12:30:30
SolutionShortFederico Kereki2003-11-19 11:58:44
Layman's analysis of a solutionAndy2003-11-19 11:11:43
solutionben2003-11-19 09:46:11
SolutionSolutionfwaff2003-11-19 09:38:00
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