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12 defective pens are accidently mixed with 132 good ones. It is not possible to just look at pen and tell whether or not it is defective. One pen is taken out at random from this lot. Find the probability tht the pen taken out is good one. Select the correct answer from above options

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Correct Answer - ` 11/12` Total number of pens = 132 + 12 = 144. Number of good pens = 132. `:. ` P(getting a good pen) ` = (132)/(144) = 11/12`.

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