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horrorfan
2 months ago
13

A sample prepared for a chemical measurement is completed correctly by 21% of the lab technicians, completed with minor error by

70% and completed with a major error by 9%. Round your answers to three decimal places (e.g. 98.765).(a) If a technician is selected randomly to complete the preparation, what is the probability it is completed without error?(b) What is the probability that it is completed with either a minor or major error?
Mathematics
1 answer:
PIT_PIT [12.4K]2 months ago
6 0

Answer:

0.210; 0.790

Step-by-step explanation:

Given the following:

Correct completion rate by technicians = 21%

Minor error occurrence rate = 70%

Major error rate in chemical sample measurement = 9%

A.) The probability that a randomly chosen technician finishes preparation without any errors:

This corresponds to the technicians' correct completion rate:

P(correct completion) = 21% = 0.210

B.) The probability of completion with either a minor or major error:

P(completion with minor error) + P(completion with major error)

= 70% + 9%

= 0.70 + 0.09

= 0.790

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