The error, in grams, made by a greengrocer's scales may be modelled by the random variable, X,

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The error, in grams, made by a greengrocer's scales may be modelled by the random variable, X, with probability density function f(x)-(0.1-3 2),

(c) the magnitude of an error is less than 4 grams (i.e. |X| <4). (AEB)

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