Data Analysis•medium

Weighted Average of Two Classes

A class of $20$ students has an average test score of $80$ . A different class of $30$ students has an average test score of $90$ . What is the average test score of all $50$ students combined?

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Data Analysis•medium

Weighted Average of Two Classes

A class of $20$ students has an average test score of $80$ . A different class of $30$ students has an average test score of $90$ . What is the average test score of all $50$ students combined?