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2. The weights of FIFA soccer balls are normally distributed with an average of 435 kg and a standard deviation of 8.7 kg. FIFA advises

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2. The weights of FIFA soccer balls are normally distributed with an average of 435 kg and a standard deviation of 8.7 kg. FIFA advises that a ball must weigh between 420 kg and 450 kg (measured at the start of a match). What percentage of soccer balls produced cannot be used for a FIFA match

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