Question 16 12 defective pens are accidently mixed with 132 good ones. It is not possible to just look at a pen and tell whether or not it is defective. One pen is taken out at random from this lot. Determine the probability that the pen taken out is a good one.
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Total number of outcomes = 132 + 12 = 144 Number of favourable outcomes = 132 Hence, P (getting a good pen) =NumberoffavourableoutcomesTotalnumberofoutcomes=132144=1112