What is probability of photo detectors in pair are defective

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Reference no: EM13229887

A machine produces photo detectors in pairs. Tests show that the first photo detector is acceptable with probability 3/5. When the first photo detector is acceptable, the second photo detector is acceptable with probability 4/5. If the first photo detector is defective, the second photo detector is acceptable with probability 2/5. Use the tree diagram to answer the following questions:

• What is the probability that exactly one photo detector of a pair is acceptable?

• What is the probability that both photo detectors in a pair are defective?

Reference no: EM13229887

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