Question

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 1

Answer:

Step-by-step explanation:

HEY

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Defective pens = 12

Good pens = 132

Total pens = 12 +132 = 144

Probability = 132 / 144

= 0 .91 or 11 / 13

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Answer 2

Solution :-

Numbers of defective pens = 12

Numbers of good pens = 132

Total numbers of pen = 132 + 12

= 144 pens

Favourable number of events = 132

Probability of getting a good pen

= 132 / 144

= 11 / 12

Thanks ..!!