Question 1159631
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The tutor @Boreal has a great table set up showing an example of 1000 orders total, and how those orders are distributed among the three workers (also whether a certain order is a mistake or not). 


However, their answer for part C is not correct. The answer for part C should be 29/700 = 0.04142857142858 approximately since there are 20+9 = 29 wrong orders made by clerk B or clerk C, out of 400+300 = 700 orders total by those two clerks. Basically you ignore row A entirely as we know for certain that the order was not filled by clerk A.
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