Question

12 defective pens are acciedently 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 random from this lot. determine the probability that the pen taken out is a good one .

Answer 1

Answer:

Total number of good pens = 132

Total number of pens = 132 + 12

= 144

Probability of getting a good pen =

$\frac{good \: pen}{total \: pens} \\ \\ = \frac{132}{144} \\ \\ = \frac{11}{12}$

If it helps mark it brainliest.

Answer 2

Answer:

the probability of the good one is around 80%

Step-by-step explanation:

actually don't give a .....