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Average of a ,\ b and c is 11; averag...

Average of `a ,\ b` and `c` is 11; average of `c ,\ d` and `e` is 17; average of `e` and `f` is 22 and average of `e` and `c` is 17. Find out the average of `a ,\ b ,\ c ,\ d ,\ e` and `f` . `15 2/3` (b) `18 1/2` (c) `16 1/2` (d) None of these

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