Solution Found!
A certain typing agency employs 2 typists. The average
Chapter 4, Problem 55P(choose chapter or problem)
Problem 55P
A certain typing agency employs 2 typists. The average number of errors per article is 3 when typed by the first typist and 4.2 when typed by the second. If your article is equally likely to be typed by either typist, approximate the probability that it will have no errors.
Questions & Answers
QUESTION:
Problem 55P
A certain typing agency employs 2 typists. The average number of errors per article is 3 when typed by the first typist and 4.2 when typed by the second. If your article is equally likely to be typed by either typist, approximate the probability that it will have no errors.
ANSWER:
Solution 55P
Step1 of 2:
Let be the number of errors if typed by first typist.
Let be the number of errors if article is typed by second typist.
Let an event A be the event that article is typed by first typist, Then P(A) =
Let z be the errors in the article.
We need to approximate the probability that it will have no errors.
Step2 of 2:
The