Question

12 defective pensare 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 1

Total pens=132+12=144.and total good pens =132.hence, probability of pen taken out to be a good one is 132/144=66/72=33/36=11/13.

mark me as branliest and follow me

Answer 2

hope it is helpful for you.............