exercise 4.19

[riz er]

howMany :: Int -> Int -> Int -> Int

howMany n1 n2 n3
	| (n1 > a) && (n2 > a) && (n3 > a) = 3
	| (n1 > a) && (n2 > a) = 2
	| (n1 > a) && (n3 > a) = 2
	| otherwise = 1
	  where a = (n1 + n2 + n3)/3


i get an error message  "ERROR C:\My Documents\Haskell 
programming\question4.19.txt:4 - Instance of Fract
ional Int required for definition of howMany"

how could i resolved this ?


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