SOLUTION: Out of six computer chips, two are defective. If two chips are randomly chosen for testing (without replacement), compute the probability that the first is defective but the se

Algebra ->  Probability-and-statistics -> SOLUTION: Out of six computer chips, two are defective. If two chips are randomly chosen for testing (without replacement), compute the probability that the first is defective but the se      Log On

2 defective

4 good

--

6 total



P(1st is defective) = 2/6



This leaves a total population of 5 from which the 2nd chip is selected:

P(2nd is not defective) = 4/5



P = (2/6)*(4/5) = 8/30 or approx. 0.267