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Consider the wafers with contamination particles in
Chapter 3, Problem 36E(choose chapter or problem)
Consider the wafers with contamination particles in Example 2-17. Assume that wafers are independent with respect to contamination particles. Wafers are selected until one with five or more contamination particles occurs. What is the probability mass function of the number of wafers selected?
Questions & Answers
QUESTION:
Consider the wafers with contamination particles in Example 2-17. Assume that wafers are independent with respect to contamination particles. Wafers are selected until one with five or more contamination particles occurs. What is the probability mass function of the number of wafers selected?
ANSWER:
Solution:
Step 1 of 2:
wafers are independent with respect to contamination particles. Wafers are selected until one with five or more contamination particles occurs.
Number of Contamination Particles |
Proportion of Wafers |
0 |
0.40 |
1 |
0.20 |
2 |
0.15 |
3 |
0.10 |
4 |
0.05 |
5 or more |
0.10 |
The claim is to find the probability mass function of the number of wafers selected.