Question

12 defective pens are accidentally mixed with 132 good pens it is not possible to just look at a pen and tell whether or not it is defective one pen is taken out and random from this lot determine the probability that the Pen taken out is a good one

Answer 1

Answer:11/12

Step-by-step explanation:

Probability = Favourble outcomes/

Total outcomes.

Good pens=132

Total pens=132+12=144

Probability of getting a good pen=132/144=11/12

Therfore the probability is 11\12

Please matk brainliest if it helps

Answer 2

Numbers of pens = Numbers of defective pens + Numbers of good pens

∴ Total number of pens = 132 + 12 = 144 pens

P(E) = (Number of favourable outcomes) / (Total number of outcomes)

P(picking a good pen) = 132/144 = 11/12

= 0.916

Hope it will be helpful :)