Question

A small independent physicians practice has three doctors. Dr. Sarabia sees 32% of the patients, Dr....

A small independent physicians practice has three doctors. Dr. Sarabia sees 32% of the patients, Dr. Tran sees 21% and Dr.jackson sees the rest.

Dr.Sarabia requests blood tests on 13% of her patients. Dr. Tran requests blood tests on 16% of his patients, and Dr.Jackson requests blood tests on 9% of his patients.

An auditor randomly selects a patient from the past week. What is the probability that the patient had a blood test requested during his visit ? (USE 3 DECIMALS)? (USE 3 DECIMALS)

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Answer #1

P(Blood test requested)

= P(Blood test | Dr. Sarabia) * P(Dr. Sarabia) + P(Blood test | Dr. Tran) * P(Dr. Tran) + P(Blood test | Dr. Jackson) * P(Dr. Jackson)

= 0.13*0.32 + 0.16*0.21 + 0.09*(1 - 0.32 - 0.21)

= 0.118

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