f3. The marks in a physics course have a mean of 79 and a standard deviation of 12. The marks in a chemistry course have
\f3. The marks in a physics course have a mean of 79 and a standard deviation of 12. The marks in a chemistry course have a mean of 70 and a standard deviation of 18. Andrew had a mark of 90% in both classes. Why might you consider one of these marks to be better than the other? (3 marks}
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