3703. Two typists typed on the same number of pages. Th

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Description

3703. Two typists typed on the same number of pages. The probability that the first typist makes a mistake is 0.3; the second is 0.2. Randomly selected page. Find the probability that:
1) there is an error on the selected page;
2) the mistake was made by the first typist.

Additional information

Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)

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