These two samples are then mixed. What is the PO2 in the resultant mixture?

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A 10 cc blood sample having PO2 = 90 mm Hg is drawn from a patient’s radial artery. A 15 cc blood sample having PO2 = 27 mm Hg is drawn from the patient’s jugular vein. These two samples are then mixed. What is the PO2 in the resultant mixture?

 
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