hard · GMAT Quant
A batch pharmacist reviews a line that is 50% type A machines (defect rate 4%) and 50% type B (defect rate 8%). A sampled unit is defective. A second independent unit from the same machine is then drawn.
What is the probability that the second unit is defective?
- dfrac115
- dfrac13
- dfrac350
- dfrac125
- dfrac225
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