Q. 16 4.6( 99 Votes )

12 defective pens are accidentally 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.

Answer :

Total number of pens = 12 + 132 = 144

Total number of good pens = 132

Probability of getting a good pen =



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