12 defective pens are accidentally mixed with 132 goods 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 not . determine the probability that the pen taken out is a good one.
raju2297:
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Probability that the pen taken out is good one is 11/12
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total pens along with defective pens is 144 and good pens in total pens is 132. probability that the taken pen is good one is 132/144
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total pens = 132+12. no. of good pens in total =132. probability = good pens/ total pens =132/144. after dividing final answer is 11/12
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Answer:
hey mate here is your answer....
Step-by-step explanation:
➡️ Total number of favorable outcome = 20
➡️ Number of favorable outcomes = 4
➡️ Hence P (getting a defective bulb) = 4 / 20 = 1 / 5
Hope it helps!☺️
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