Hospital tests-five vials from each shipment

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A hospital obtains 40% of its flu vaccine from company A, 50% from company B and 10% from company C. From past experience its known that 2% of the vials from A are ineffective, 1% from B are ineffective and 4 % from C are ineffective. The hospital tests five vials from each shipment. If at least one of the five is ineffective, find the conditional probability pf that shipment's having come from C.

Reference no: EM1398087

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