SOLUTION: The probability that a typist will make at most 5 mistakes when typing a report is 0.59 and the probability that she will make 6 to 10 mistakes is 0.26. Find the probability that

Question 1190786: The probability that a typist will make at most 5 mistakes when typing a report is 0.59 and the probability that she will make 6 to 10 mistakes is 0.26. Find the probability that the typist will make at most 10 mistakes.
Answer by ikleyn(52887) (Show Source): You can put this solution on YOUR website!
.
The probability that a typist will make at most 5 mistakes when typing a report is 0.59
and the probability that she will make 6 to 10 mistakes is 0.26.
Find the probability that the typist will make at most 10 mistakes.
~~~~~~~~~~~~~~~

The event making at most 10 mistakes is the UNION of two disjoint events:


    1)  making at most 5 mistakes, which has the probability of  0.59  (given),

and

    2) making 6 to 10 mistakes, which has the probability of 0.26  (given).


THEREFORE, the answer to the problem's question is the sum of probabilities


    P = 0.59 + 0.26 = 0.85.

Solved.

Very nice joke problem.

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