What is the average number of times a drawing must be examined by a client before it is accepted?

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter12: Probability
Section12.4: Discrete Random Variables; Applications To Decision Making
Problem 4E
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Based on past experience, an architect has determined the probability mass function for the number of times a
drawing must be examined by a client before it is accepted. Let the random variable X= the number of times a
drawing must be examined by a client before it is accepted. The distribution of X is shown below.
Value of X
2
3
4
5
Probability
0.1
0.2
0.3
0.2
0.2
What is the average number of times a drawing must be examined by a client before it is accepted? (Do not
round).
Transcribed Image Text:Based on past experience, an architect has determined the probability mass function for the number of times a drawing must be examined by a client before it is accepted. Let the random variable X= the number of times a drawing must be examined by a client before it is accepted. The distribution of X is shown below. Value of X 2 3 4 5 Probability 0.1 0.2 0.3 0.2 0.2 What is the average number of times a drawing must be examined by a client before it is accepted? (Do not round).
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ISBN:
9780321964038
Author:
GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:
Pearson Addison Wesley,