Errors in medical prescriptions occur relatively frequently. In a study, two groups of doctors had similar error rates and one group switched to e-prescriptions while the other continued with hand- written prescriptions. One year later, the number of errors was measured. The results are given in the two-way table. Error 254 1478 No Error 3594 2370 Total Electronic Written Total (1) Fill in the row and column totals. (2) What proportion of all the prescriptions had errors in them? (3) What proportion of electronic prescriptions had errors in them? (4) What proportion of written prescriptions had errors in them? (5) What proportion of the prescriptions with errors were written prescriptions?

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