Mathematics, 19.01.2022 21:00 purplefive85
ross has a mean mark of 50% for her three math tests and then she earns a mark of 70% on her fourth test. ross states that since the average of 50 and 70 is 60, her new mean math is 60%. do you think ross is correct?
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ross has a mean mark of 50% for her three math tests and then she earns a mark of 70% on her fourth...
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