Mathematics, 01.05.2021 21:50 ssollers

In a group of 60 workers, the average (arithmetic mean) salary is $80 a day per worker. If some of the workers earn $75 a day and all the rest earn $100 a day, how many workers eaen $75 a day?

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In a group of 60 workers, the average (arithmetic mean) salary is $80 a day per worker. If some of t...

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