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What was the average number of correct answers from each of the last 30 people only?

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30 people were given 10 quiz questions, they correctly answered an average of only three each.

After a further 30 people had answered the quiz, the average number of correct answers rose to six per person.

What was the average number of correct answers from each of the last 30 people only?

posted Mar 10, 2016 by Kapil Kapoor

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