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In an assessment the first 17 people. What was the average number of points scored by the last 30 people only?

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In an assessment the first 17 people scored an average of three points each. After a further 30 people had taken the assessment the average score rose to nine points each. What was the average number of points scored by the last 30 people only?

posted Sep 15, 2017 by Mogadala Ramana

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