- #1
teme92
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Homework Statement
Suppose that upon using a particular testing device, a defective component has a 70% chance of being found as defective, and a non-defective component has just a 10% chance of being found defective. Suppose also that within a quality control batch, the probability of a randomly selected component being defective is 12%.
i)What is the probability that a component selected at random from the batch is found to test positive (i.e. tests as being defective)?
ii)What is the probability that a randomly selected component is defective, given it is found to test positive?
Homework Equations
The Attempt at a Solution
i)I said:
(0.12)(0.7) +(0.88)(.1)=0.172
ii)'m having trouble wrapping my head around this one. Did I use the correct method for the first part? Also any help in the second part would be much appreciated.