The given data represents the maximum temperature (in ?C) of 11 different cities on a particular day .
29.2 ,28.7 ,33.1 ,34.0,30.3,32.2 ,30.8,28.7,27.9 ,31.0 ,29.5
If a,b and c represent the respective median , mode and mean of the given data , then what is the value of (3a-2c-b) ?

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