*A hospital receives 1/5 of its flu vaccine shipments from Company X and the remainder of its shipments from other companies. Each ship- ment contains a very large number of vaccine vials. For Company X's shipments, 10% of the vials are ineffective. For every other company, 2% of the vials are ineffective. The hospital tests 30 randomly selected vials from a shipment and finds that one vial is ineffective. What is the probability that this shipment came from Company X ? L0056)

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19. *A hospital receives 1/5 of its flu vaccine shipments from Company X
and the remainder of its shipments from other companies. Each ship-
ment contains a very large number of vaccine vials. For Company X's
shipments, 10% of the vials are ineffective. For every other company,
2% of the vials are ineffective. The hospital tests 30 randomly selected
vials from a shipment and finds that one vial is ineffective.
What is the probability that this shipment came from Company X ?
(0.0956)
Transcribed Image Text:19. *A hospital receives 1/5 of its flu vaccine shipments from Company X and the remainder of its shipments from other companies. Each ship- ment contains a very large number of vaccine vials. For Company X's shipments, 10% of the vials are ineffective. For every other company, 2% of the vials are ineffective. The hospital tests 30 randomly selected vials from a shipment and finds that one vial is ineffective. What is the probability that this shipment came from Company X ? (0.0956)
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